In the process,the light energy converts to heat energy.A:changes B:drops C:reduces D:leaves

题目
In the process,the light energy converts to heat energy.

A:changes
B:drops
C:reduces
D:leaves
相似考题

1.Electromagnetic EnergyWhite light seems to be a combination of all colors. The energy that comes from a source of light is not limited to the kind of energy you can see. Heat is given off by a flame or an electric light. On a cloudy day it is possible to get a sunburn even though you feel cool. Visible light and the kind of energy that produce warmth and sunburn are examples of electromagnetic energy.The sun is 93 million miles from the earth. Yet we can use energy from the sun because electromagnetic energy travels through space.Many other kinds of energy are also types of electromagnetic energy. Radio, television, and radar signals travel from transmitters to receivers as low-energy electromagnetic waves. Infrared (红外线的) radiation is an electromagnetic wave. When it is absorbed by matter, heat is produced. Waves of infrared and visible light have more energy than waves of radio, television, or radar. Ultraviolet rays (紫外线) and X-rays are electromagnetic waves with even greater amounts of energy. Infrared radiation is used in cooking food and heating buildings. Sunlight and electric lights are part of our requirements for normal living. Ultraviolet radiation is useful in killing certain disease organisms. X-rays and gamma rays have so mush energy that they travel right through solid objects. They can be used to detect and treat cancer. X-rays are used in industry to find hidden cracks in metal, and in medicine to reveal broken bones.Usually we use electricity to generate electromagnetic energy. The source of most of our energy is the sun. Heat from the sun causes water to evaporate. When the water falls to the earth as rain, some of it is trapped behind dams and then used to operate electric generators. Other generators are powered by coal, but the energy stored in coal came from the sun, too.Until recently, the source of the tremendous amount of energy given off by the sun was a puzzle. If the sun depended on chemical reactions, it would have used up all its energy long ago. Experiments with electromagnetic radiation led to the theory that mass can be converted into energy. About forty years after the theory was proposed, nuclear energy was harnessed (利用) by man. Chemical energy comes from electron (电子) rearrangement. Nuclear energy comes from a change in the nucleus of an atom. Compared with chemical reactions, nuclear reactions release millions of times more energy per pound of fuel. We now believe that the sun's energy comes from the nuclear reactions in which hydrogen is changed into helium(氦).Nuclear energy is beginning to compete with coal as an economical source of power to generate electricity. It is also being used to operate engines in large ships. Scientists continue to seek new and better methods of obtaining and using energy.A. Nuclear Reactions as the Lasting Source of the Sun's EnergyB. The Most Important Source of EnergyC. Types of Electromagnetic EnergyD. X-rays Are Used to Detect and Treat Cancer.E. Seeking New Sources of EnergyF. Nuclear Energy is Beginning to Compete with CoalParagraph 3 ______

2.What does the author mainly discuss in the text?A. Technology. B. Sustainability.C. Ethanol energy. D. Environmental protection.

3.For what purpose are the diving pipes used?A. To absorb heat from the sun.B. To store heat for future use.C. To turn solar energy into heat energy.D. To carry heat down below the surface.

4.Smart WindowWindows not only let light in to cut down an electricity use for lighting, but the light coming through the window also provides heat. However, windows are not something people typically associate with being a cutting edge technology. Researchers are now working on new technologies that enable a window to quickly change from clear to dark and anywhere in between with a flip of a switch."It took us a long time to figure out what a window really is," says Claes Granqvist. He's a professor of solid-state physics at Uppsala University in Sweden. "It's contact with the outside world. You have to have visual contact with the surrounding world to feel well. " So, windows and natural light are important for improving the way people feel when they're stuck indoors.Yet, windows are the weak link in a building when it comes to energy and temperature control. In the winter, cold air leaks in. When it's hot and sunny, sunlight streams in. All of this sunlight carries lots of heat and energy. And all of this extra heat forces people to turn on their air conditioners. Producing blasts of cold air, which can feel so refreshing, actually suck up enormous amounts of electricity in buildings around the world.Windows have been a major focus of energy research for a long time. Over the years, scientists have come up with a variety of strategies for coating, glazing, and layering windows to make them more energy efficient. Smart windows go a step further. They use chromogenic technologies which involve changes of color.Electrochromic windows use electricity to change color. For example, a sheet of glass coated with thin layers of chemical compound such as tungsten oxide works a bit like a battery. Tungsten oxide is clear when an electric charge is applied and dark when the charge is removed, that is, when the amount of voltage is decreased, the window darkens until it's completely dark after all electricity is taken away. So applying a voltage determines whether the window looks clear or dark.One important feature that makes a smart window so smart is that it has a sort of "memory. " All it takes is a small jolt of voltage to turn the window from one state to the other. Then, it stays that way. Transitions take anywhere from 10 seconds to a few minutes, depending on the size of the window. The development of smart windows could mean that massive air conditioning systems may no longer need. "In the future," Granqvist says, "our buildings may look different. "Which of the following statements does not indicate the importance of windows as described in the first two paragraphs?A．Windows can change from clear to dark to save energy.B．Windows help to save energy by letting light in.C．Windows help to save energy by providing heat.D．Windows enable people to have contact with the outside world.

更多“In the process,the light energy converts to heat energy.”相关问题

  • 第1题：

    There are different ways in which people try to deal with the problem of energy. One way is the greater production of common energy sources, such as coal, oil and gas. The trouble with these sources, however, is that they are not renewable.

    Another way is energy conservation ( 节能 ), which means using energy more efficiently ( 有效地 ). In some very cold countries people build special houses to save energy. They place materials between the inside and the outside of the walls of the house to keep the cold out and the warmth in. The house is heated by the lights, the body heat of the people and the other equipment in it.

    Finally, renewable energy sources are used even though they are often expensive to develop. One form. of these is geothermal energy. In certain parts of the world the temperature of the earth increases thirty degrees centigrade with each kilometer down. At six kilometers, therefore, it rises to nearly two hundred degrees. To get the heat, water is pumped ( 压;抽 ) down into the rocks and back up to the surface. Heat from the earth is already used in certain countries.

    1、How many ways of dealing with the energy problem are discussed in the text? ( )

    A、Two.

    B、Three.

    C、Four.

    D、Five.

    2、From the text we learn that coal( ).

    A、is quite easy to produce

    B、is not used most efficiently

    C、is the most common source of energy

    D、could be renewed only by new technology

    3、The writer tells about the "special houses" because they( ).

    A、show the excellent skills of the builders

    B、serve as an example of energy conservation

    C、are heated by different sources of energy

    D、are warmer than other types of houses

    4、The underlined words "geothermal energy" in the third paragraph mean ( ).

    A、renewable source

    B、 underground source

    C、 heat inside the earth

    D、 temperature of the earth

    5、At a place where the surface temperature is 15°C, how deep do you have to dig so as to get a temperature of 75 °C ? ( )

    A、One km.

    B、 Two km.

    C、 Three km.

    D、 Four km


    正确答案：1B、2C、3B、4A、5B


  • 第2题：

    Chemical energy can ________ heat energy.

    A.become into

    B.grow up

    C.be changed into

    D.be covered with


    参考答案：C

  • 第3题：

    共用题干
    Electromagnetic Energy

    1 White light seems to be a combination of all colors.The energy that comes from a source of light is
    not limited to the kind of energy you can see.Heat is given off by a flame or an electric light.On a cloudy
    day it is possible to get a sunburn even though you feel cool.Visible light and the kind of energy that produce
    warmth and sunburn are examples of electromagnetic energy.
    2 The sun is 93 million miles away from the earth.Yet we can use energy from the sun because elec-
    tromagnetic energy travels through space.
    3 Many other kinds of energy are also types of electromagnetic energy.Radio,television,and radar signals
    travel from transmitters to receivers as low-energy electromagnetic waves. Infrared（红外线的）radiation is an
    electromagnetic wave.When it is absorbed by matter,heat is produced.Waves of infrared and visible light
    have more energy than waves of radio , television , or radar. Ultraviolet rays（紫外线）and X-rays are electro-
    magnetic waves with even greater amounts of energy.Infrared radiation is used in cooking food and heating
    buildings.Sunlight and electric lights are part of our requirements for normal living. Ultraviolet radiation is
    useful in killing certain disease organisms.X-rays and gamma rays have so much energy that they travel right
    through solid objects.They can be used to detect and treat cancer. X-rays are used in industry to find hidden
    cracks in metal,and in medicine to reveal broken bones.
    4 Usually we use electricity to generate electromagnetic energy.The source of most of our energy is the
    sun.Heat from the sun causes water to evaporate.When the water falls to the earth as rain,some of it is
    trapped behind dams and then used to operate electric generators.Other generators are powered by coal,but
    the energy stored in coal came from the sun,too.
    5 Until recently,the source of the tremendous amount of energy given off by the sun was a puzzle.If
    the.sun depended on chemical reactions,it would have used up all its energy long ago.Experiments with
    electromagnetic radiation led to the theory that mass can be converted into energy.About forty years after the
    theory was proposed , nuclear energy was harnessed（利用）by man. Chemical energy comes from electron
    （电子）rearrangement. Nuclear energy comes from a change in the nucleus of an atom. Compared with chemi-
    cal reactions,nuclear reactions release millions of times more energy per pound of fuel.We now believe that
    the sun's energy comes from the nuclear reactions in which hydrogen is changed into helium（氦）.
    6 Nuclear energy is beginning to compete with coal as an economical source of power to generate elec-
    tncity.It is also being used to operate engines in large ships.Scientists continue to seek new and better
    methods of obtaining and using energy.

    The energy stored in coal_____________.
    A:electromagnetic energy
    B:electromagnetic energy travels through space
    C:came from the sun
    D:when a change in the nucleus of an atom takes place
    E:when the sunrays are fierce
    F:chemical energy is generated

    答案：C
    解析：
    第三段的第一句为主题句，意为：许多其他种类的能量也是不同类型的电磁能。该段列举了电磁能的具体例子，C项“Types of Electromagnetic Energy（电磁能的类型）”与主题句意思吻合，故选C。
    第四段的第二句为主题句，意为：我们的能量大多来自太阳。B项“The Most ImportantSource of Energy（最重要的能量来源）”与主题句意思吻合，故选B。
    第五段的最后一句为主题句，意为：我们现在相信太阳的能量来自核反应，在此过程 中，氢转变为氦。A项“Nuclear Reactions as the Lasting Source of the Sun ' s Energy（核反应是太阳能最持久的来源）”与主题句意思吻合，故选A。
    第六段的最后一句为主题句，意为：科学家仍在继续寻找获取和使用能量的新的、更好 的方法。E项“Seeking New Sources of Energy（寻找新的能源）”与主题句意思吻合，故选E。
    第一段的最后一句指出，“可见光和其他能产生热量和造成晒伤的能量都是电磁能的例子”。故选A。
    第二段的第二句指出，“我们能使用太阳能，因为电磁能可以在太空中穿梭”。故选B。
    第四段的最后一句指出，“其他的发电机靠煤炭驱动，但是，煤炭中储存的能量也来自 于太阳”。C项中的“came from the sun（来自太阳）”与原句意思相符，故选C。
    第五段的第五句指出，化学能来自于电子重组。故选F。第4部分：阅读理解第一篇 本文的主要内容是建筑工程师研究世贸大厦遗址及其周围幸存的建筑以设计出能够抵杭恐 怖袭击和爆炸的建筑。

  • 第4题：

    共用题干
    Electromagnetic Energy

    1 White light seems to be a combination of all colors.The energy that comes from a source of light is
    not limited to the kind of energy you can see.Heat is given off by a flame or an electric light.On a cloudy
    day it is possible to get a sunburn even though you feel cool.Visible light and the kind of energy that produce
    warmth and sunburn are examples of electromagnetic energy.
    2 The sun is 93 million miles away from the earth.Yet we can use energy from the sun because elec-
    tromagnetic energy travels through space.
    3 Many other kinds of energy are also types of electromagnetic energy.Radio,television,and radar signals
    travel from transmitters to receivers as low-energy electromagnetic waves. Infrared（红外线的）radiation is an
    electromagnetic wave.When it is absorbed by matter,heat is produced.Waves of infrared and visible light
    have more energy than waves of radio , television , or radar. Ultraviolet rays（紫外线）and X-rays are electro-
    magnetic waves with even greater amounts of energy.Infrared radiation is used in cooking food and heating
    buildings.Sunlight and electric lights are part of our requirements for normal living. Ultraviolet radiation is
    useful in killing certain disease organisms.X-rays and gamma rays have so much energy that they travel right
    through solid objects.They can be used to detect and treat cancer. X-rays are used in industry to find hidden
    cracks in metal,and in medicine to reveal broken bones.
    4 Usually we use electricity to generate electromagnetic energy.The source of most of our energy is the
    sun.Heat from the sun causes water to evaporate.When the water falls to the earth as rain,some of it is
    trapped behind dams and then used to operate electric generators.Other generators are powered by coal,but
    the energy stored in coal came from the sun,too.
    5 Until recently,the source of the tremendous amount of energy given off by the sun was a puzzle.If
    the.sun depended on chemical reactions,it would have used up all its energy long ago.Experiments with
    electromagnetic radiation led to the theory that mass can be converted into energy.About forty years after the
    theory was proposed , nuclear energy was harnessed（利用）by man. Chemical energy comes from electron
    （电子）rearrangement. Nuclear energy comes from a change in the nucleus of an atom. Compared with chemi-
    cal reactions,nuclear reactions release millions of times more energy per pound of fuel.We now believe that
    the sun's energy comes from the nuclear reactions in which hydrogen is changed into helium（氦）.
    6 Nuclear energy is beginning to compete with coal as an economical source of power to generate elec-
    tncity.It is also being used to operate engines in large ships.Scientists continue to seek new and better
    methods of obtaining and using energy.

    Paragraph 5_____________
    A:Nuclear Reactions as the Lasting Source of the Sun's Energy
    B:The Most Important Source of Energy
    C:Types of Electromagnetic Energy
    D:X-rays Are Used to Detect and Treat Cancer
    E:Seeking New Sources of Energy
    F:Nuclear Energy Is Beginning to Compete With Coal

    答案：A
    解析：
    第三段的第一句为主题句，意为：许多其他种类的能量也是不同类型的电磁能。该段列举了电磁能的具体例子，C项“Types of Electromagnetic Energy（电磁能的类型）”与主题句意思吻合，故选C。
    第四段的第二句为主题句，意为：我们的能量大多来自太阳。B项“The Most ImportantSource of Energy（最重要的能量来源）”与主题句意思吻合，故选B。
    第五段的最后一句为主题句，意为：我们现在相信太阳的能量来自核反应，在此过程 中，氢转变为氦。A项“Nuclear Reactions as the Lasting Source of the Sun ' s Energy（核反应是太阳能最持久的来源）”与主题句意思吻合，故选A。
    第六段的最后一句为主题句，意为：科学家仍在继续寻找获取和使用能量的新的、更好 的方法。E项“Seeking New Sources of Energy（寻找新的能源）”与主题句意思吻合，故选E。
    第一段的最后一句指出，“可见光和其他能产生热量和造成晒伤的能量都是电磁能的例子”。故选A。
    第二段的第二句指出，“我们能使用太阳能，因为电磁能可以在太空中穿梭”。故选B。
    第四段的最后一句指出，“其他的发电机靠煤炭驱动，但是，煤炭中储存的能量也来自 于太阳”。C项中的“came from the sun（来自太阳）”与原句意思相符，故选C。
    第五段的第五句指出，化学能来自于电子重组。故选F。第4部分：阅读理解第一篇 本文的主要内容是建筑工程师研究世贸大厦遗址及其周围幸存的建筑以设计出能够抵杭恐 怖袭击和爆炸的建筑。

  • 第5题：

    共用题干
    Electromagnetic Energy
    1 White light seems to be a combination of all colors.The energy that comes from a source of light is not limited to the kind of energy you can see.Heat is given off by a flame or an electric light.On a cloudy day it is possible to get a sunburn even though you feel cool.Visible light and the kinds of energy that produce warmth and sunburn are examples of electromagnetic energy.
    2 The sun is 93 million miles from the earth.Yet we can use energy from the sun because electromagnetic energy travels through space.
    3 Many other kinds of energy are also types of electromagnetic energy.Radio,television,and radar signals travel from transmitters to receivers as low-energy electromagnetic waves.Infrared（红外线的）radiation is an electromagnetic wave.When it is absorbed by matter,heat is produced.Waves of infrared and visible light have more energy than waves of radio,television,or radar.Ultraviolet rays（紫外线）and X-rays are electromagnetic waves with even greater amounts of energy.Infrared radiation is used in cooking food and heating buildings. Sunlight and electric lights are part of our requirements for normal living.Ultraviolet radiation is useful in killing certain disease organisms.X-rays and gamma rays have so much energy that they travel through solid objects. They can be used to detect and treat cancer.X-rays are used in industry to find hidden cracks in metal,and in medicine to reveal broken bones.
    4 Usually we use electricity to generate electromagnetic energy.The source of most of our energy is the sun.Heat from the sun causes water to evaporate.When the water falls to the earth as rain,some of it is trapped behind dams and then used to operate electric generators.Other generators are powered by coal,but the energy stored in coal came from the sun,too.
    5 Until recently,the source of the tremendous amount of energy given off by the sun was a puzzle.If the sun depended on chemical reactions,it would have used up all its energy long ago.Experiments with electromagnetic radiation led to the theory that mass can be converted into energy.About forty years after the theory was proposed , nuclear energy was harnessed（利用）by man.Chemical energy comes from electron （电子）rearrangement.Nuclear energy comes from a change in the nucleus of an atom.Compared with chemical reactions,nuclear reactions release millions of times more energy per pound of fuel.We now believe that the sun's energy comes from the nuclear reactions in which hydrogen is changed into helium（氦）.
    6 Nuclear energy is beginning to compete with coal as an economical source of'power to generate electricity.It is also being used to operate engines in large ships.Scientists continue to seek new and better methods of obtaining and using energy.

    X-rays and gamma rays can be used to detect and treat cancer______.
    A:when it is absorbed by matter
    B:when it is cloudy
    C:because they can pass through solid objects
    D:when the sunrays are fierce.
    E:when a change in the nucleus of an atom takes place
    F:when electron rearrangement takes place

    答案：C
    解析：
    通读文章可知，第三段第一句是段落主题句，紧接着围绕第一句进行了具体阐述，根据第一句中出现的“types of electromagnetic energy”可知，第三段主要讲述几种不同种类的电磁能，应选择C项。
    根据第四段第一、二句可知，我们通常用电来生成电磁能，使用的很多能源都来自太阳。紧接着又表明，水能源于来自太阳的热能，煤储存的能量也是来自太阳。因此不难得出，第四段讲的是能量最重要的来源，即太阳。
    第五段开头提到太阳能的来源仍是个谜，随后对此进行了分析，最后得出太阳能来自核反应释放的能量。由此可知，第五段主要讲的是，氢原子转变为氦原子的核反应释放的能量是太阳能的来源。几个选项中只有A项提到核反应是太阳能的持久来源，因此选择A项。
    通读文章可知，第六段的最后一句是主题句。这句话的大意是：科学家正继续在寻找更好的新方法来获取并使用能源。几个选项中只有E项与之契合，因此选择E项。
    根据第一段第四句可知，你即便在感到凉爽的阴天，也有可能被阳光灼伤，因此选择B项。
    根据第三段第三、四句可知，红外线是电磁波，当它被物质吸收时，会产生能量。
    根据第三段倒数第二、三句可知，X射线和伽马射线之所以能用来探测和治疗癌症，是因为具有很多能量的x射线和伽马射线能穿透固体。
    根据第五段第五句可知，化学能是在电子重组时产生的。

  • 第6题：

    共用题干
    Electromagnetic Energy

    1 White light seems to be a combination of all colors.The energy that comes from a source of light is
    not limited to the kind of energy you can see.Heat is given off by a flame or an electric light.On a cloudy
    day it is possible to get a sunburn even though you feel cool.Visible light and the kind of energy that produce
    warmth and sunburn are examples of electromagnetic energy.
    2 The sun is 93 million miles away from the earth.Yet we can use energy from the sun because elec-
    tromagnetic energy travels through space.
    3 Many other kinds of energy are also types of electromagnetic energy.Radio,television,and radar signals
    travel from transmitters to receivers as low-energy electromagnetic waves. Infrared（红外线的）radiation is an
    electromagnetic wave.When it is absorbed by matter,heat is produced.Waves of infrared and visible light
    have more energy than waves of radio , television , or radar. Ultraviolet rays（紫外线）and X-rays are electro-
    magnetic waves with even greater amounts of energy.Infrared radiation is used in cooking food and heating
    buildings.Sunlight and electric lights are part of our requirements for normal living. Ultraviolet radiation is
    useful in killing certain disease organisms.X-rays and gamma rays have so much energy that they travel right
    through solid objects.They can be used to detect and treat cancer. X-rays are used in industry to find hidden
    cracks in metal,and in medicine to reveal broken bones.
    4 Usually we use electricity to generate electromagnetic energy.The source of most of our energy is the
    sun.Heat from the sun causes water to evaporate.When the water falls to the earth as rain,some of it is
    trapped behind dams and then used to operate electric generators.Other generators are powered by coal,but
    the energy stored in coal came from the sun,too.
    5 Until recently,the source of the tremendous amount of energy given off by the sun was a puzzle.If
    the.sun depended on chemical reactions,it would have used up all its energy long ago.Experiments with
    electromagnetic radiation led to the theory that mass can be converted into energy.About forty years after the
    theory was proposed , nuclear energy was harnessed（利用）by man. Chemical energy comes from electron
    （电子）rearrangement. Nuclear energy comes from a change in the nucleus of an atom. Compared with chemi-
    cal reactions,nuclear reactions release millions of times more energy per pound of fuel.We now believe that
    the sun's energy comes from the nuclear reactions in which hydrogen is changed into helium（氦）.
    6 Nuclear energy is beginning to compete with coal as an economical source of power to generate elec-
    tncity.It is also being used to operate engines in large ships.Scientists continue to seek new and better
    methods of obtaining and using energy.

    Visible light that produces warmth is an example of______________.
    A:electromagnetic energy
    B:electromagnetic energy travels through space
    C:came from the sun
    D:when a change in the nucleus of an atom takes place
    E:when the sunrays are fierce
    F:chemical energy is generated

    答案：A
    解析：
    第三段的第一句为主题句，意为：许多其他种类的能量也是不同类型的电磁能。该段列举了电磁能的具体例子，C项“Types of Electromagnetic Energy（电磁能的类型）”与主题句意思吻合，故选C。
    第四段的第二句为主题句，意为：我们的能量大多来自太阳。B项“The Most ImportantSource of Energy（最重要的能量来源）”与主题句意思吻合，故选B。
    第五段的最后一句为主题句，意为：我们现在相信太阳的能量来自核反应，在此过程 中，氢转变为氦。A项“Nuclear Reactions as the Lasting Source of the Sun ' s Energy（核反应是太阳能最持久的来源）”与主题句意思吻合，故选A。
    第六段的最后一句为主题句，意为：科学家仍在继续寻找获取和使用能量的新的、更好 的方法。E项“Seeking New Sources of Energy（寻找新的能源）”与主题句意思吻合，故选E。
    第一段的最后一句指出，“可见光和其他能产生热量和造成晒伤的能量都是电磁能的例子”。故选A。
    第二段的第二句指出，“我们能使用太阳能，因为电磁能可以在太空中穿梭”。故选B。
    第四段的最后一句指出，“其他的发电机靠煤炭驱动，但是，煤炭中储存的能量也来自 于太阳”。C项中的“came from the sun（来自太阳）”与原句意思相符，故选C。
    第五段的第五句指出，化学能来自于电子重组。故选F。第4部分：阅读理解第一篇 本文的主要内容是建筑工程师研究世贸大厦遗址及其周围幸存的建筑以设计出能够抵杭恐 怖袭击和爆炸的建筑。

  • 第7题：

    共用题干
    Electromagnetic Energy

    1 White light seems to be a combination of all colors.The energy that comes from a source of light is
    not limited to the kind of energy you can see.Heat is given off by a flame or an electric light.On a cloudy
    day it is possible to get a sunburn even though you feel cool.Visible light and the kind of energy that produce
    warmth and sunburn are examples of electromagnetic energy.
    2 The sun is 93 million miles away from the earth.Yct we can use energy from die sun because elec-
    tromagnetic energy travels through space.
    3 Many other kinds of energy are also types of electromagnetic energy.Radio,television,and radar signais
    travel from transmitters to receivers as low-energy electromagnetic waves. Infrared（红外线的）radiation is an
    electromagnetic wave.When it is absorbed by matter,heat is produced.Wayes of infrared and visible light
    have more energy than waves of radio,television,or radar. Ultraviolet rays（紫外线）and X-rays are eleetro-
    magnetic waves with even greater amounts of energy.Infrared radiation is used in cooking food and heating
    buildings.Sunlight and electric lights are part of our requirements for normal living. Ultraviolet radiation is
    useful in killing certain disease organisms.X-rays and gamma rays have so much energy that they travel right
    through solid objects.They can be used to detect and treat cancer。 X-rays are used in industry to find hidden
    cracks in metal,and in medicine to reveal broken bones.
    4 Usually we use electricity to generate electromagnetic energy.The source of most of our energy is the
    sun.Heat from the sun causes water to evaporate.When the water falls to the earth as rain,some of it is
    trapped behind dams and then used to operate electric generators,Other generators are powered by coal,but
    the energy stored in coal came from the sun,too.
    5 Until recently,the source of the tremendous amount of energy given off by the sun was a puzzle.If
    the sun depended on chemical reactions,it would have used up all its energy long ago.Experiments with
    electromagnetic radiation led to the theory that mass can be converted into energy．入bout forty years after the
    theory was proposed , nuclear energy was harnessed（利用）by man. Chemical energy comes from electron
    （电子）rearrangement. Nuclear energy comes from a change in the nucleus of an atom. Compared with chemi-
    cal reactions,nuclear reactions release millions of times more energy per pound of fuel.We now believe that
    the sun's energy comes from the nuclear reactions in which hydrogen is changed into helium（氦）.
    6 Nuclear energy is beginning to compete with coal as an economical source of power to generate elec-
    tricity.It is also being used to operate engines in large ships.Scientists continue to seek new and better
    methods of obtaining and using energy.

    We can use energy from the sun because_______________.
    A:electromagnetic energy
    B:electromagnetic energy travels through space
    C:came from the sun
    D:when a change in the nucleus of an atom takes place
    E:whlen the sunrays are fierce
    F:chemical energy is generated

    答案：B
    解析：
    第三段的第一句为主题句，意为：许多其他种类的能量也是不同类型的电磁能。该段 列举了电磁能的具体例子，C项“Types of Electromagnetic Energy（电磁能的类型）”与主题句意 思吻合，故选C。
    第四段的第二句为主题句，意为：我们的能量大多来白太阳。B项“The Most Important Source of Energy（最重要的能量来源）”与主题句意思吻合，故选B。
    第五段的最后一句为主题句，意为；我们现在相信太阳的能量来自核反应，在此过程 中，氢转变为氦。A项“Nuclear Reactions as the Lasting Source of the Sun' s Energy（核反应是太 阳能最持久的来源）”与主题句意思吻合，故选A。
    第六段的最后一句为主题句，意为：科学家仍在继续寻找获取和使用能量的新的、更好 的方法。E项“Seeking New Sources of Energy（寻找新的能源）”与主题句意思吻合，故选E。
    第一段的最后一句指出，“可见光和其他能产生热量和造成晒伤的能量都是电磁能的 例子”。故选A。
    第二段的第二句指出，“我们能使用太阳能，因为电磁能可以在太空中穿梭”。故选B。
    第四段的最后一句指出，“其他的发电机靠煤炭驱动，但是，煤炭中储存的能量也来自 于太阳”。C项中的“came from the sun (来自太阳）”与原句意思相符，故选C。
    第五段的第五句指出，化学能来自于电子重组。故选F。第4部分：阅读理解第一篇 本文介绍了引起食物中毒的原因及食物中毒的预防和治疗处理措施。

  • 第8题：

    共用题干
    Electromagnetic Energy

    1 White light seems to be a combination of all colors.The energy that comes from a source of light is
    not limited to the kind of energy you can see.Heat is given off by a flame or an electric light.On a cloudy
    day it is possible to get a sunburn even though you feel cool.Visible light and the kind of energy that produce
    warmth and sunburn are examples of electromagnetic energy.
    2 The sun is 93 million miles away from the earth.Yct we can use energy from die sun because elec-
    tromagnetic energy travels through space.
    3 Many other kinds of energy are also types of electromagnetic energy.Radio,television,and radar signais
    travel from transmitters to receivers as low-energy electromagnetic waves. Infrared（红外线的）radiation is an
    electromagnetic wave.When it is absorbed by matter,heat is produced.Wayes of infrared and visible light
    have more energy than waves of radio,television,or radar. Ultraviolet rays（紫外线）and X-rays are eleetro-
    magnetic waves with even greater amounts of energy.Infrared radiation is used in cooking food and heating
    buildings.Sunlight and electric lights are part of our requirements for normal living. Ultraviolet radiation is
    useful in killing certain disease organisms.X-rays and gamma rays have so much energy that they travel right
    through solid objects.They can be used to detect and treat cancer。 X-rays are used in industry to find hidden
    cracks in metal,and in medicine to reveal broken bones.
    4 Usually we use electricity to generate electromagnetic energy.The source of most of our energy is the
    sun.Heat from the sun causes water to evaporate.When the water falls to the earth as rain,some of it is
    trapped behind dams and then used to operate electric generators,Other generators are powered by coal,but
    the energy stored in coal came from the sun,too.
    5 Until recently,the source of the tremendous amount of energy given off by the sun was a puzzle.If
    the sun depended on chemical reactions,it would have used up all its energy long ago.Experiments with
    electromagnetic radiation led to the theory that mass can be converted into energy．入bout forty years after the
    theory was proposed , nuclear energy was harnessed（利用）by man. Chemical energy comes from electron
    （电子）rearrangement. Nuclear energy comes from a change in the nucleus of an atom. Compared with chemi-
    cal reactions,nuclear reactions release millions of times more energy per pound of fuel.We now believe that
    the sun's energy comes from the nuclear reactions in which hydrogen is changed into helium（氦）.
    6 Nuclear energy is beginning to compete with coal as an economical source of power to generate elec-
    tricity.It is also being used to operate engines in large ships.Scientists continue to seek new and better
    methods of obtaining and using energy.

    When electron rearrangement takes place_______________.
    A:electromagnetic energy
    B:electromagnetic energy travels through space
    C:came from the sun
    D:when a change in the nucleus of an atom takes place
    E:whlen the sunrays are fierce
    F:chemical energy is generated

    答案：F
    解析：
    第三段的第一句为主题句，意为：许多其他种类的能量也是不同类型的电磁能。该段 列举了电磁能的具体例子，C项“Types of Electromagnetic Energy（电磁能的类型）”与主题句意 思吻合，故选C。
    第四段的第二句为主题句，意为：我们的能量大多来白太阳。B项“The Most Important Source of Energy（最重要的能量来源）”与主题句意思吻合，故选B。
    第五段的最后一句为主题句，意为；我们现在相信太阳的能量来自核反应，在此过程 中，氢转变为氦。A项“Nuclear Reactions as the Lasting Source of the Sun' s Energy（核反应是太 阳能最持久的来源）”与主题句意思吻合，故选A。
    第六段的最后一句为主题句，意为：科学家仍在继续寻找获取和使用能量的新的、更好 的方法。E项“Seeking New Sources of Energy（寻找新的能源）”与主题句意思吻合，故选E。
    第一段的最后一句指出，“可见光和其他能产生热量和造成晒伤的能量都是电磁能的 例子”。故选A。
    第二段的第二句指出，“我们能使用太阳能，因为电磁能可以在太空中穿梭”。故选B。
    第四段的最后一句指出，“其他的发电机靠煤炭驱动，但是，煤炭中储存的能量也来自 于太阳”。C项中的“came from the sun (来自太阳）”与原句意思相符，故选C。
    第五段的第五句指出，化学能来自于电子重组。故选F。第4部分：阅读理解第一篇 本文介绍了引起食物中毒的原因及食物中毒的预防和治疗处理措施。

  • 第9题：

    They’re doing some very innovative work in solar energy.“innovative” here means something out of date.


    正确答案:错误

  • 第10题：

    单选题
    In a diesel engine, offers the heat energy directly（）； works as working medium and changes the heat energy to mechanical energy（）
    A

    the burning of the fuel； medium shaft

    B

    fuel spray； fresh air

    C

    fuel； fuel spray

    D

    the burning of the fuel； the burned gas mixture


    正确答案： C
    解析： 暂无解析

  • 第11题：

    多选题
    When a router converts analog signals to digital signals， what three steps are always included in the process？（）
    A

    involution

    B

    encoding

    C

    sampling

    D

    quantization

    E

    compression

    F

    companding


    正确答案： E,F
    解析： 暂无解析

  • 第12题：

    单选题
    Which of the following centrifugal pump components converts the liquid kinetic energy of velocity to the potential energy of pressure?（）
    A

    Impeller

    B

    Electric motor

    C

    Volute

    D

    Eye


    正确答案： C
    解析： 暂无解析

  • 第13题：

    In New Zealand, hydroelectricity from rivers and dams supplies ________ of total energy.

    A.15%

    B.16%

    C.17%

    D.18%


    正确答案：C

  • 第14题：

    共用题干
    Electromagnetic Energy
    1 White light seems to be a combination of all colors.The energy that comes from a source of light is not limited to the kind of energy you can see.Heat is given off by a flame or an electric light.On a cloudy day it is possible to get a sunburn even though you feel cool.Visible light and the kinds of energy that produce warmth and sunburn are examples of electromagnetic energy.
    2 The sun is 93 million miles from the earth.Yet we can use energy from the sun because electromagnetic energy travels through space.
    3 Many other kinds of energy are also types of electromagnetic energy.Radio,television,and radar signals travel from transmitters to receivers as low-energy electromagnetic waves.Infrared（红外线的）radiation is an electromagnetic wave.When it is absorbed by matter,heat is produced.Waves of infrared and visible light have more energy than waves of radio,television,or radar.Ultraviolet rays（紫外线）and X-rays are electromagnetic waves with even greater amounts of energy.Infrared radiation is used in cooking food and heating buildings. Sunlight and electric lights are part of our requirements for normal living.Ultraviolet radiation is useful in killing certain disease organisms.X-rays and gamma rays have so much energy that they travel through solid objects. They can be used to detect and treat cancer.X-rays are used in industry to find hidden cracks in metal,and in medicine to reveal broken bones.
    4 Usually we use electricity to generate electromagnetic energy.The source of most of our energy is the sun.Heat from the sun causes water to evaporate.When the water falls to the earth as rain,some of it is trapped behind dams and then used to operate electric generators.Other generators are powered by coal,but the energy stored in coal came from the sun,too.
    5 Until recently,the source of the tremendous amount of energy given off by the sun was a puzzle.If the sun depended on chemical reactions,it would have used up all its energy long ago.Experiments with electromagnetic radiation led to the theory that mass can be converted into energy.About forty years after the theory was proposed , nuclear energy was harnessed（利用）by man.Chemical energy comes from electron （电子）rearrangement.Nuclear energy comes from a change in the nucleus of an atom.Compared with chemical reactions,nuclear reactions release millions of times more energy per pound of fuel.We now believe that the sun's energy comes from the nuclear reactions in which hydrogen is changed into helium（氦）.
    6 Nuclear energy is beginning to compete with coal as an economical source of'power to generate electricity.It is also being used to operate engines in large ships.Scientists continue to seek new and better methods of obtaining and using energy.

    Infrared radiation can produce heat______.
    A:when it is absorbed by matter
    B:when it is cloudy
    C:because they can pass through solid objects
    D:when the sunrays are fierce.
    E:when a change in the nucleus of an atom takes place
    F:when electron rearrangement takes place

    答案：A
    解析：
    通读文章可知，第三段第一句是段落主题句，紧接着围绕第一句进行了具体阐述，根据第一句中出现的“types of electromagnetic energy”可知，第三段主要讲述几种不同种类的电磁能，应选择C项。
    根据第四段第一、二句可知，我们通常用电来生成电磁能，使用的很多能源都来自太阳。紧接着又表明，水能源于来自太阳的热能，煤储存的能量也是来自太阳。因此不难得出，第四段讲的是能量最重要的来源，即太阳。
    第五段开头提到太阳能的来源仍是个谜，随后对此进行了分析，最后得出太阳能来自核反应释放的能量。由此可知，第五段主要讲的是，氢原子转变为氦原子的核反应释放的能量是太阳能的来源。几个选项中只有A项提到核反应是太阳能的持久来源，因此选择A项。
    通读文章可知，第六段的最后一句是主题句。这句话的大意是：科学家正继续在寻找更好的新方法来获取并使用能源。几个选项中只有E项与之契合，因此选择E项。
    根据第一段第四句可知，你即便在感到凉爽的阴天，也有可能被阳光灼伤，因此选择B项。
    根据第三段第三、四句可知，红外线是电磁波，当它被物质吸收时，会产生能量。
    根据第三段倒数第二、三句可知，X射线和伽马射线之所以能用来探测和治疗癌症，是因为具有很多能量的x射线和伽马射线能穿透固体。
    根据第五段第五句可知，化学能是在电子重组时产生的。

  • 第15题：

    共用题干
    Electromagnetic Energy

    1 White light seems to be a combination of all colors.The energy that comes from a source of light is
    not limited to the kind of energy you can see.Heat is given off by a flame or an electric light.On a cloudy
    day it is possible to get a sunburn even though you feel cool.Visible light and the kind of energy that produce
    warmth and sunburn are examples of electromagnetic energy.
    2 The sun is 93 million miles away from the earth.Yet we can use energy from the sun because elec-
    tromagnetic energy travels through space.
    3 Many other kinds of energy are also types of electromagnetic energy.Radio,television,and radar signals
    travel from transmitters to receivers as low-energy electromagnetic waves. Infrared（红外线的）radiation is an
    electromagnetic wave.When it is absorbed by matter,heat is produced.Waves of infrared and visible light
    have more energy than waves of radio , television , or radar. Ultraviolet rays（紫外线）and X-rays are electro-
    magnetic waves with even greater amounts of energy.Infrared radiation is used in cooking food and heating
    buildings.Sunlight and electric lights are part of our requirements for normal living. Ultraviolet radiation is
    useful in killing certain disease organisms.X-rays and gamma rays have so much energy that they travel right
    through solid objects.They can be used to detect and treat cancer. X-rays are used in industry to find hidden
    cracks in metal,and in medicine to reveal broken bones.
    4 Usually we use electricity to generate electromagnetic energy.The source of most of our energy is the
    sun.Heat from the sun causes water to evaporate.When the water falls to the earth as rain,some of it is
    trapped behind dams and then used to operate electric generators.Other generators are powered by coal,but
    the energy stored in coal came from the sun,too.
    5 Until recently,the source of the tremendous amount of energy given off by the sun was a puzzle.If
    the.sun depended on chemical reactions,it would have used up all its energy long ago.Experiments with
    electromagnetic radiation led to the theory that mass can be converted into energy.About forty years after the
    theory was proposed , nuclear energy was harnessed（利用）by man. Chemical energy comes from electron
    （电子）rearrangement. Nuclear energy comes from a change in the nucleus of an atom. Compared with chemi-
    cal reactions,nuclear reactions release millions of times more energy per pound of fuel.We now believe that
    the sun's energy comes from the nuclear reactions in which hydrogen is changed into helium（氦）.
    6 Nuclear energy is beginning to compete with coal as an economical source of power to generate elec-
    tncity.It is also being used to operate engines in large ships.Scientists continue to seek new and better
    methods of obtaining and using energy.

    When electron rearrangement takes place,_____________.
    A:electromagnetic energy
    B:electromagnetic energy travels through space
    C:came from the sun
    D:when a change in the nucleus of an atom takes place
    E:when the sunrays are fierce
    F:chemical energy is generated

    答案：F
    解析：
    第三段的第一句为主题句，意为：许多其他种类的能量也是不同类型的电磁能。该段列举了电磁能的具体例子，C项“Types of Electromagnetic Energy（电磁能的类型）”与主题句意思吻合，故选C。
    第四段的第二句为主题句，意为：我们的能量大多来自太阳。B项“The Most ImportantSource of Energy（最重要的能量来源）”与主题句意思吻合，故选B。
    第五段的最后一句为主题句，意为：我们现在相信太阳的能量来自核反应，在此过程 中，氢转变为氦。A项“Nuclear Reactions as the Lasting Source of the Sun ' s Energy（核反应是太阳能最持久的来源）”与主题句意思吻合，故选A。
    第六段的最后一句为主题句，意为：科学家仍在继续寻找获取和使用能量的新的、更好 的方法。E项“Seeking New Sources of Energy（寻找新的能源）”与主题句意思吻合，故选E。
    第一段的最后一句指出，“可见光和其他能产生热量和造成晒伤的能量都是电磁能的例子”。故选A。
    第二段的第二句指出，“我们能使用太阳能，因为电磁能可以在太空中穿梭”。故选B。
    第四段的最后一句指出，“其他的发电机靠煤炭驱动，但是，煤炭中储存的能量也来自 于太阳”。C项中的“came from the sun（来自太阳）”与原句意思相符，故选C。
    第五段的第五句指出，化学能来自于电子重组。故选F。第4部分：阅读理解第一篇 本文的主要内容是建筑工程师研究世贸大厦遗址及其周围幸存的建筑以设计出能够抵杭恐 怖袭击和爆炸的建筑。

  • 第16题：

    共用题干
    Electromagnetic Energy
    1 White light seems to be a combination of all colors.The energy that comes from a source of light is not limited to the kind of energy you can see.Heat is given off by a flame or an electric light.On a cloudy day it is possible to get a sunburn even though you feel cool.Visible light and the kinds of energy that produce warmth and sunburn are examples of electromagnetic energy.
    2 The sun is 93 million miles from the earth.Yet we can use energy from the sun because electromagnetic energy travels through space.
    3 Many other kinds of energy are also types of electromagnetic energy.Radio,television,and radar signals travel from transmitters to receivers as low-energy electromagnetic waves.Infrared（红外线的）radiation is an electromagnetic wave.When it is absorbed by matter,heat is produced.Waves of infrared and visible light have more energy than waves of radio,television,or radar.Ultraviolet rays（紫外线）and X-rays are electromagnetic waves with even greater amounts of energy.Infrared radiation is used in cooking food and heating buildings. Sunlight and electric lights are part of our requirements for normal living.Ultraviolet radiation is useful in killing certain disease organisms.X-rays and gamma rays have so much energy that they travel through solid objects. They can be used to detect and treat cancer.X-rays are used in industry to find hidden cracks in metal,and in medicine to reveal broken bones.
    4 Usually we use electricity to generate electromagnetic energy.The source of most of our energy is the sun.Heat from the sun causes water to evaporate.When the water falls to the earth as rain,some of it is trapped behind dams and then used to operate electric generators.Other generators are powered by coal,but the energy stored in coal came from the sun,too.
    5 Until recently,the source of the tremendous amount of energy given off by the sun was a puzzle.If the sun depended on chemical reactions,it would have used up all its energy long ago.Experiments with electromagnetic radiation led to the theory that mass can be converted into energy.About forty years after the theory was proposed , nuclear energy was harnessed（利用）by man.Chemical energy comes from electron （电子）rearrangement.Nuclear energy comes from a change in the nucleus of an atom.Compared with chemical reactions,nuclear reactions release millions of times more energy per pound of fuel.We now believe that the sun's energy comes from the nuclear reactions in which hydrogen is changed into helium（氦）.
    6 Nuclear energy is beginning to compete with coal as an economical source of'power to generate electricity.It is also being used to operate engines in large ships.Scientists continue to seek new and better methods of obtaining and using energy.

    Paragraph 4______
    A:Nuclear Reactions as the Lasting Source of the Sun's Energy
    B:The Most Important Source of Energy
    C:Types of Electromagnetic Energy
    D:The Machines Used for Energy Generation
    E:Seeking New Sources of Energy
    F:The Use of Ultravio1et Radiation in Medicine

    答案：B
    解析：
    通读文章可知，第三段第一句是段落主题句，紧接着围绕第一句进行了具体阐述，根据第一句中出现的“types of electromagnetic energy”可知，第三段主要讲述几种不同种类的电磁能，应选择C项。
    根据第四段第一、二句可知，我们通常用电来生成电磁能，使用的很多能源都来自太阳。紧接着又表明，水能源于来自太阳的热能，煤储存的能量也是来自太阳。因此不难得出，第四段讲的是能量最重要的来源，即太阳。
    第五段开头提到太阳能的来源仍是个谜，随后对此进行了分析，最后得出太阳能来自核反应释放的能量。由此可知，第五段主要讲的是，氢原子转变为氦原子的核反应释放的能量是太阳能的来源。几个选项中只有A项提到核反应是太阳能的持久来源，因此选择A项。
    通读文章可知，第六段的最后一句是主题句。这句话的大意是：科学家正继续在寻找更好的新方法来获取并使用能源。几个选项中只有E项与之契合，因此选择E项。
    根据第一段第四句可知，你即便在感到凉爽的阴天，也有可能被阳光灼伤，因此选择B项。
    根据第三段第三、四句可知，红外线是电磁波，当它被物质吸收时，会产生能量。
    根据第三段倒数第二、三句可知，X射线和伽马射线之所以能用来探测和治疗癌症，是因为具有很多能量的x射线和伽马射线能穿透固体。
    根据第五段第五句可知，化学能是在电子重组时产生的。

  • 第17题：

    共用题干
    Electromagnetic Energy
    1 White light seems to be a combination of all colors.The energy that comes from a source of light is not limited to the kind of energy you can see.Heat is given off by a flame or an electric light.On a cloudy day it is possible to get a sunburn even though you feel cool.Visible light and the kinds of energy that produce warmth and sunburn are examples of electromagnetic energy.
    2 The sun is 93 million miles from the earth.Yet we can use energy from the sun because electromagnetic energy travels through space.
    3 Many other kinds of energy are also types of electromagnetic energy.Radio,television,and radar signals travel from transmitters to receivers as low-energy electromagnetic waves.Infrared（红外线的）radiation is an electromagnetic wave.When it is absorbed by matter,heat is produced.Waves of infrared and visible light have more energy than waves of radio,television,or radar.Ultraviolet rays（紫外线）and X-rays are electromagnetic waves with even greater amounts of energy.Infrared radiation is used in cooking food and heating buildings. Sunlight and electric lights are part of our requirements for normal living.Ultraviolet radiation is useful in killing certain disease organisms.X-rays and gamma rays have so much energy that they travel through solid objects. They can be used to detect and treat cancer.X-rays are used in industry to find hidden cracks in metal,and in medicine to reveal broken bones.
    4 Usually we use electricity to generate electromagnetic energy.The source of most of our energy is the sun.Heat from the sun causes water to evaporate.When the water falls to the earth as rain,some of it is trapped behind dams and then used to operate electric generators.Other generators are powered by coal,but the energy stored in coal came from the sun,too.
    5 Until recently,the source of the tremendous amount of energy given off by the sun was a puzzle.If the sun depended on chemical reactions,it would have used up all its energy long ago.Experiments with electromagnetic radiation led to the theory that mass can be converted into energy.About forty years after the theory was proposed , nuclear energy was harnessed（利用）by man.Chemical energy comes from electron （电子）rearrangement.Nuclear energy comes from a change in the nucleus of an atom.Compared with chemical reactions,nuclear reactions release millions of times more energy per pound of fuel.We now believe that the sun's energy comes from the nuclear reactions in which hydrogen is changed into helium（氦）.
    6 Nuclear energy is beginning to compete with coal as an economical source of'power to generate electricity.It is also being used to operate engines in large ships.Scientists continue to seek new and better methods of obtaining and using energy.

    One can get a sunburn even______.
    A:when it is absorbed by matter
    B:when it is cloudy
    C:because they can pass through solid objects
    D:when the sunrays are fierce.
    E:when a change in the nucleus of an atom takes place
    F:when electron rearrangement takes place

    答案：B
    解析：
    通读文章可知，第三段第一句是段落主题句，紧接着围绕第一句进行了具体阐述，根据第一句中出现的“types of electromagnetic energy”可知，第三段主要讲述几种不同种类的电磁能，应选择C项。
    根据第四段第一、二句可知，我们通常用电来生成电磁能，使用的很多能源都来自太阳。紧接着又表明，水能源于来自太阳的热能，煤储存的能量也是来自太阳。因此不难得出，第四段讲的是能量最重要的来源，即太阳。
    第五段开头提到太阳能的来源仍是个谜，随后对此进行了分析，最后得出太阳能来自核反应释放的能量。由此可知，第五段主要讲的是，氢原子转变为氦原子的核反应释放的能量是太阳能的来源。几个选项中只有A项提到核反应是太阳能的持久来源，因此选择A项。
    通读文章可知，第六段的最后一句是主题句。这句话的大意是：科学家正继续在寻找更好的新方法来获取并使用能源。几个选项中只有E项与之契合，因此选择E项。
    根据第一段第四句可知，你即便在感到凉爽的阴天，也有可能被阳光灼伤，因此选择B项。
    根据第三段第三、四句可知，红外线是电磁波，当它被物质吸收时，会产生能量。
    根据第三段倒数第二、三句可知，X射线和伽马射线之所以能用来探测和治疗癌症，是因为具有很多能量的x射线和伽马射线能穿透固体。
    根据第五段第五句可知，化学能是在电子重组时产生的。

  • 第18题：

    The energy（ ）by the chain reaction is transformed into heat.

    A.conveyed
    B.released
    C.transferred
    D.delivered

    答案：B
    解析：
    句意：在连锁反应中释放的能量转化成了热能。B.release“释放”为正确答案。A.convey指“运送，输送；传达”。C.transfer意为“（从……往……）运送，转移；调任”。D.deliver指“递送，传送”。

  • 第19题：

    共用题干
    Electromagnetic Energy

    1 White light seems to be a combination of all colors.The energy that comes from a source of light is
    not limited to the kind of energy you can see.Heat is given off by a flame or an electric light.On a cloudy
    day it is possible to get a sunburn even though you feel cool.Visible light and the kind of energy that produce
    warmth and sunburn are examples of electromagnetic energy.
    2 The sun is 93 million miles away from the earth.Yct we can use energy from die sun because elec-
    tromagnetic energy travels through space.
    3 Many other kinds of energy are also types of electromagnetic energy.Radio,television,and radar signais
    travel from transmitters to receivers as low-energy electromagnetic waves. Infrared（红外线的）radiation is an
    electromagnetic wave.When it is absorbed by matter,heat is produced.Wayes of infrared and visible light
    have more energy than waves of radio,television,or radar. Ultraviolet rays（紫外线）and X-rays are eleetro-
    magnetic waves with even greater amounts of energy.Infrared radiation is used in cooking food and heating
    buildings.Sunlight and electric lights are part of our requirements for normal living. Ultraviolet radiation is
    useful in killing certain disease organisms.X-rays and gamma rays have so much energy that they travel right
    through solid objects.They can be used to detect and treat cancer。 X-rays are used in industry to find hidden
    cracks in metal,and in medicine to reveal broken bones.
    4 Usually we use electricity to generate electromagnetic energy.The source of most of our energy is the
    sun.Heat from the sun causes water to evaporate.When the water falls to the earth as rain,some of it is
    trapped behind dams and then used to operate electric generators,Other generators are powered by coal,but
    the energy stored in coal came from the sun,too.
    5 Until recently,the source of the tremendous amount of energy given off by the sun was a puzzle.If
    the sun depended on chemical reactions,it would have used up all its energy long ago.Experiments with
    electromagnetic radiation led to the theory that mass can be converted into energy．入bout forty years after the
    theory was proposed , nuclear energy was harnessed（利用）by man. Chemical energy comes from electron
    （电子）rearrangement. Nuclear energy comes from a change in the nucleus of an atom. Compared with chemi-
    cal reactions,nuclear reactions release millions of times more energy per pound of fuel.We now believe that
    the sun's energy comes from the nuclear reactions in which hydrogen is changed into helium（氦）.
    6 Nuclear energy is beginning to compete with coal as an economical source of power to generate elec-
    tricity.It is also being used to operate engines in large ships.Scientists continue to seek new and better
    methods of obtaining and using energy.

    Paragraph 4__________________
    A:Nuclear Reactions as the Lasting Source of the Sun's Energy
    B:The Most Imoprtant Source of Energy
    C:Types of Eleetromagnetie Energy
    D:X-rays Are Used to Detect and Treat Cancer
    E:Seeking New Sourees of Energy
    F:Nuclear Energy Is Beginning to Compete With Coal

    答案：B
    解析：
    第三段的第一句为主题句，意为：许多其他种类的能量也是不同类型的电磁能。该段 列举了电磁能的具体例子，C项“Types of Electromagnetic Energy（电磁能的类型）”与主题句意 思吻合，故选C。
    第四段的第二句为主题句，意为：我们的能量大多来白太阳。B项“The Most Important Source of Energy（最重要的能量来源）”与主题句意思吻合，故选B。
    第五段的最后一句为主题句，意为；我们现在相信太阳的能量来自核反应，在此过程 中，氢转变为氦。A项“Nuclear Reactions as the Lasting Source of the Sun' s Energy（核反应是太 阳能最持久的来源）”与主题句意思吻合，故选A。
    第六段的最后一句为主题句，意为：科学家仍在继续寻找获取和使用能量的新的、更好 的方法。E项“Seeking New Sources of Energy（寻找新的能源）”与主题句意思吻合，故选E。
    第一段的最后一句指出，“可见光和其他能产生热量和造成晒伤的能量都是电磁能的 例子”。故选A。
    第二段的第二句指出，“我们能使用太阳能，因为电磁能可以在太空中穿梭”。故选B。
    第四段的最后一句指出，“其他的发电机靠煤炭驱动，但是，煤炭中储存的能量也来自 于太阳”。C项中的“came from the sun (来自太阳）”与原句意思相符，故选C。
    第五段的第五句指出，化学能来自于电子重组。故选F。第4部分：阅读理解第一篇 本文介绍了引起食物中毒的原因及食物中毒的预防和治疗处理措施。

  • 第20题：

    共用题干
    Electromagnetic Energy

    1 White light seems to be a combination of all colors.The energy that comes from a source of light is
    not limited to the kind of energy you can see.Heat is given off by a flame or an electric light.On a cloudy
    day it is possible to get a sunburn even though you feel cool.Visible light and the kind of energy that produce
    warmth and sunburn are examples of electromagnetic energy.
    2 The sun is 93 million miles away from the earth.Yct we can use energy from die sun because elec-
    tromagnetic energy travels through space.
    3 Many other kinds of energy are also types of electromagnetic energy.Radio,television,and radar signais
    travel from transmitters to receivers as low-energy electromagnetic waves. Infrared（红外线的）radiation is an
    electromagnetic wave.When it is absorbed by matter,heat is produced.Wayes of infrared and visible light
    have more energy than waves of radio,television,or radar. Ultraviolet rays（紫外线）and X-rays are eleetro-
    magnetic waves with even greater amounts of energy.Infrared radiation is used in cooking food and heating
    buildings.Sunlight and electric lights are part of our requirements for normal living. Ultraviolet radiation is
    useful in killing certain disease organisms.X-rays and gamma rays have so much energy that they travel right
    through solid objects.They can be used to detect and treat cancer。 X-rays are used in industry to find hidden
    cracks in metal,and in medicine to reveal broken bones.
    4 Usually we use electricity to generate electromagnetic energy.The source of most of our energy is the
    sun.Heat from the sun causes water to evaporate.When the water falls to the earth as rain,some of it is
    trapped behind dams and then used to operate electric generators,Other generators are powered by coal,but
    the energy stored in coal came from the sun,too.
    5 Until recently,the source of the tremendous amount of energy given off by the sun was a puzzle.If
    the sun depended on chemical reactions,it would have used up all its energy long ago.Experiments with
    electromagnetic radiation led to the theory that mass can be converted into energy．入bout forty years after the
    theory was proposed , nuclear energy was harnessed（利用）by man. Chemical energy comes from electron
    （电子）rearrangement. Nuclear energy comes from a change in the nucleus of an atom. Compared with chemi-
    cal reactions,nuclear reactions release millions of times more energy per pound of fuel.We now believe that
    the sun's energy comes from the nuclear reactions in which hydrogen is changed into helium（氦）.
    6 Nuclear energy is beginning to compete with coal as an economical source of power to generate elec-
    tricity.It is also being used to operate engines in large ships.Scientists continue to seek new and better
    methods of obtaining and using energy.

    Visible light that produces warmth is an example of _______________.
    A:electromagnetic energy
    B:electromagnetic energy travels through space
    C:came from the sun
    D:when a change in the nucleus of an atom takes place
    E:whlen the sunrays are fierce
    F:chemical energy is generated

    答案：A
    解析：
    第三段的第一句为主题句，意为：许多其他种类的能量也是不同类型的电磁能。该段 列举了电磁能的具体例子，C项“Types of Electromagnetic Energy（电磁能的类型）”与主题句意 思吻合，故选C。
    第四段的第二句为主题句，意为：我们的能量大多来白太阳。B项“The Most Important Source of Energy（最重要的能量来源）”与主题句意思吻合，故选B。
    第五段的最后一句为主题句，意为；我们现在相信太阳的能量来自核反应，在此过程 中，氢转变为氦。A项“Nuclear Reactions as the Lasting Source of the Sun' s Energy（核反应是太 阳能最持久的来源）”与主题句意思吻合，故选A。
    第六段的最后一句为主题句，意为：科学家仍在继续寻找获取和使用能量的新的、更好 的方法。E项“Seeking New Sources of Energy（寻找新的能源）”与主题句意思吻合，故选E。
    第一段的最后一句指出，“可见光和其他能产生热量和造成晒伤的能量都是电磁能的 例子”。故选A。
    第二段的第二句指出，“我们能使用太阳能，因为电磁能可以在太空中穿梭”。故选B。
    第四段的最后一句指出，“其他的发电机靠煤炭驱动，但是，煤炭中储存的能量也来自 于太阳”。C项中的“came from the sun (来自太阳）”与原句意思相符，故选C。
    第五段的第五句指出，化学能来自于电子重组。故选F。第4部分：阅读理解第一篇 本文介绍了引起食物中毒的原因及食物中毒的预防和治疗处理措施。

  • 第21题：

    Select 3 features of IBM’s CoolBlue Energy Management Innovation：（）

    • A、IBM Active Energy Manager， Calibrated Vectored Cooling， and Water Chilled Door eXchanger  
    • B、IBM Active Energy Manager， Front Door Heat eXchanger， and Calibrated Vectored Cooling
    • C、Power Configurator， Calibrated Vectored Cooling， and Rear Door Heat eXchanger
    • D、Thermal Diagnostics， Front Door Heat eXchanger， and Rear Door Heat eXchanger

    正确答案:C

  • 第22题：

    单选题
    A

    Plants in Hawaii.

    B

    Uses for cold seawater.

    C

    Techniques for protecting environment.

    D

    The importance of saving energy.


    正确答案： D
    解析：
    [考点]主旨题。录音提到“What these engineers have been using is cold seawater.”接下来作者谈论这种cold seawater的用途。

  • 第23题：

    单选题
    Which of the following forms of energy is demonstrated through the process of combustion?（）
    A

    Chemical energy

    B

    Mechanical energy

    C

    Thermal energy

    D

    Electrical energy


    正确答案： C
    解析： 暂无解析

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