Techniques to employ the energy of the sun are being developed.A:convert B:store C:use D:receive

题目
Techniques to employ the energy of the sun are being developed.

A:convert
B:store
C:use
D:receive
相似考题

1.When people speak of solar energy, they only think of sun’s rays heating a home or ________ electricity from the sun.A.deriveB.to deriveC.derivingD.of deriving.

2.We can use energy from the sun because ______.

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.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 ______

更多“ Techniques to employ the energy of the sun are being developed.”相关问题

  • 第1题：

    To get some idea of the amount of heat the sun ________(1), think about this. If you ________(2)collect all the heat that hits the earth in a two-week period, it would equal the amount of all the other known sources and reserves of energy: wood, coal, and oil. But even these sources of energy depend ________(3) the sun for their formation. For example, a tree ________ (4) certainly never grow and provide fuel in the form. of wood were it not for the sun. Because the sun is so important in the production of all forms of heating fuel, more and more time and money are being spent ________(5) ways to change power from the sun directly into a form. of heat.

    1.

    A、gives off

    B、turns off

    C、takes off

    D、sets off

    2.

    A、will

    B、could

    C、must

    D、shall

    3.

    A、of

    B、in

    C、on

    D、to

    4.

    A、will

    B、must

    C、shall

    D、would

    5.

    A、study

    B、studied

    C、studying

    D、being studying


    参考答案：ABCDC

  • 第2题：

    Which of the following statements in supported by the passage?

    A．The sun shines constantly and gives out the same amount of energy every year．

    B．The cause of the sun’S fluctuations is its loss of energy with each passing year

    C．It is sure that the energy sent out by the sun will drop when more sun spots appear．

    D．Fluctuations in weather pattems are the results of the pull of gravity．


    正确答案：C
    参见第四自然段“…as the size and number of sun spots increased，the over-all energy sent out by the sun would：decrease”可得知C正确。

  • 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 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.

    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.

    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 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.

    Chemical energy is generated______.
    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：F
    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7题：

    Techniques to harness such energy are yet to be developed.

    A:convert
    B:utilize
    C:store
    D:receive

    答案：B
    解析：
    本句意思：目前还没有利用这种能量的技术。convert的意思为“转变，使改变信仰”;uti- lize的意思为“利用”;store作动词的意思为“储存”;receive的意思为“收到”。harness的意思为 “利用，治理”，和utilize的意思接近。

  • 第8题：

    Which of these technologies is characterized as being a multipoint Layer 2 VPN that connects twoor more customer devices using Ethernet bridging techniques？（）

    • A、 DPT
    • B、 MPLS
    • C、 VPLS
    • D、 CWDM
    • E、 DWDM
    • F、 SONET/SDH

    正确答案:C

  • 第9题：

    单选题
    The NIF process of nuclear fusion involves ______.
    A

    high lab temperatures of about 10 million Celsius

    B

    ultra powerful lasers being used to produce huge gravitational pressure

    C

    deuterium and helium being fused together to form tritium

    D

    delivering ultraviolet energy to hit the target


    正确答案： C
    解析：
    题目问的是：NIF的核聚变步骤包括什么？从文章第16段“When all NIF lasers are fired at full energy, they will deliver 1.8 megajoules of ultraviolet energy to the target.”可知，会传递紫外线能量来击中目标。故选D。

  • 第10题：

    单选题
    The centrifugal pump component responsible for converting the mechanical energy of the liquid being pumped, to that of kinetic energy is the （）.
    A

    electric motor

    B

    volute

    C

    impeller

    D

    diffusion nozzle


    正确答案： D
    解析： 暂无解析

  • 第11题：

    单选题
    There are different forms of energy, _____ come from the sun.
    A

    that

    B

    most of that

    C

    most of them

    D

    most of which


    正确答案： D
    解析：
    此句为非限制性定语从句，排除A、C。that不能引导非限制性从句，而逗号不能连接两个句子。介词后的关系代词不能用that，因此B也不对，故选D。

  • 第12题：

    单选题
    Which of these technologies is characterized as being a multipoint Layer 2 VPN that connects two or more customer devices using Ethernet bridging techniques?（）
    A

    DPT

    B

    MPLS

    C

    VPLS

    D

    CWDM

    E

    DWDM

    F

    SONET/SDH


    正确答案： A
    解析： 暂无解析

  • 第13题：

    The accounting principles () shall be the same as those applied in preceding years.

    A、being employed

    B、employing

    C、employed

    D、employ


    参考答案：C

  • 第14题：

    Techniques to employ the energy of the sun are being developed.

    A:convert
    B:store
    C:use
    D:receive

    答案：C
    解析：
    use“使用”; convert“使转变，转换······”。store"贮藏，贮备，存储”。receive“接收”。employ本身也有“使用”的意思，所以C项正确。

  • 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.

    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 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.

    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18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.

    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:when 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19题：

    Techniques to harness the energy of the sun are being developed.

    A:convert
    B:store
    C:utilise
    D:receive

    答案：C
    解析：
    本句意思：利用太阳能的技术正处于研究中。harness控制（情感），利用（自然力）。 utilise利用，使用；convert转换；store储存；receive接收，收到。

  • 第20题：

    Which of the following is the MOST important reason for referencing the HCL？（）

    • A、 To ensure that all hardware being used has previously been tested
    • B、 To ensure that all hardware being used has the latest firmware
    • C、 To ensure that all hardware being used is the most energy efficient
    • D、 To ensure that all hardware being used can be upgraded in the future

    正确答案:A

  • 第21题：

    单选题
    As they use energy only for motion, a snake can live longer without food than a human being。
    A

    they use

    B

    for

    C

    without food

    D

    than


    正确答案： C
    解析：

  • 第22题：

    单选题
    The basic function of the centrifugal pump impeller is to （）.
    A

    directly increase the pressure of the liquid being pumped

    B

    directly increase the velocity of the liquid being pumped

    C

    convert the potential energy of the liquid to kinetic energy

    D

    separate air from the liquid being pumped


    正确答案： B
    解析： 暂无解析

  • 第23题：

    单选题
    Which of the following is the MOST important reason for referencing the HCL？（）
    A

     To ensure that all hardware being used has previously been tested

    B

     To ensure that all hardware being used has the latest firmware

    C

     To ensure that all hardware being used is the most energy efficient

    D

     To ensure that all hardware being used can be upgraded in the future


    正确答案： C
    解析： 暂无解析

  • 第24题：

    单选题
    We learn from the passage that ______.
    A

    all living things on the earth depend on the sun for their food

    B

    a forest looks dark in winter because it absorbs solar energy

    C

    only 0.023 of the energy from the sun is made use of on the earth

    D

    greenhouse gases allow heat energy to escape from the earth’ s surface


    正确答案： B
    解析：
    根据第一段Sunlight also provides the energy used by green plants to make their own food，阳光给绿色植物提供能量使其生产自己的食物，故选A。

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