单选题The sentence “Our planet has shrunk” underlined in Paragraph 1 means that __________.A the earth has become physically smallerB the more advanced ways of traveling has made the distance between countries shorterC the traditional concept of our planet h

题目
单选题
The sentence “Our planet has shrunk” underlined in Paragraph 1 means that __________.
A

the earth has become physically smaller

B

the more advanced ways of traveling has made the distance between countries shorter

C

the traditional concept of our planet has become out-of-date

D

modern means of communication has made it much easier for people to communicate with each other from different parts of the world

相似考题

1.I think a new era in the relationships between our two countries has _______.A. set aboutB. set outC. set upD. set in

2.Most of us，when we reached our teens，started looking forward to the day when we would occupy places of our own，far from the confines of our families. We saw this moving away as a chance to strike out on our own，to grow，to spread out wings and experience freedom. At the same time，we regarded this independence as temporary-the thing to do until we found the perfect mate and married. Over the years，many millions of people have made this passage from one family to another，with just a brief，often nervous interval of independence in between. But recently，more and more people have begun to challenge the concept that living together is better than living alone. Being single is now accepted as an alternative lifestyle-one that is natural，rewarding，and complete. In fact，being single has become almost fashionable.

3.A greenhouse is a building made of glass which is used for keeping plants when the outside temperature is low. In a similar way there are several gases in the atmosphere which trap(捕捉)the heat produced by the sun and prevent it from escaping. These gases are known as"greenhouse gases"，and the way in which they trap heat in the atmosphere is called the "greenhouse effect". This is not simply air pollution. Most of the main greenhouse gases exist naturally in small amounts in our atmosphere, and without them earth would be 30 degrees colder and human life would not exist. In other words, the greenhouse effect is a natural course which is to some degree helpful to us.The problem is that in the last century and a half, we have been putting too many of these gases into the earth's atmosphere by burning large quantities of coal and oil and by cutting down forests. The rapid increase in greenhouse gases is making the world warmer. The world's temperature has already gone up by half a degree this century, and the sea level has risen by 10 centimetres. If the amount of carbon dioxide(二氧化碳)in the atmosphere doubles, there will probably be a rise in the earth's temperature of between 1 and 4 degrees. This may seem a small increase, but it would be enough to cause major changes in geography and agriculture. Large areas of the world would be flooded, and some areas would become dry and unable to produce crops. It is important, too, to consider that there may be a delay of about 30 years in the greenhouse effect. This means that we are probably experiencing only now the effect of the gases put into the atmosphere before the 1960s. Since then, our use of these gases has greatly increased.1. The"greenhouse effect"means _____.A. the way in which gases are used for keeping plants warmB. a natural course which is some degree helpful to usC. the way"greenhouse gases"trap heat on the earthD. the whole course in which greenhouse gases prevent heat2. If there were no greenhouse effect, _____.A. no plants would grow on our planetB. earth would be thirty degrees colderC. man could not live on the earthD. All of the above answers are correct3. Which of the following is NOT true? _____A. Burning too much coal and oil produces lots of greenhouse gases.B. It has become warmer on the earth now than in the past.C. Gases put into the atmosphere now will affect the earth years later.D. The temperature in a greenhouse is as high as that in the atmosphere.4. Suppose the earth's temperature rose by 3 degrees, _____.A. great harm would be done to mankindB. the sea level would go by 10 centimetresC. all the land in the world would be floodedD. crops would be unable to grow on the earth5. This passage mainly deals with _____.A. the concept(概念)and harm of greenhouse effectB. the relation between greenhouse gases and manC. the concept and change of greenhouse effectD. the effect of the rise of the earth's temperature

4.Today in Hollywood ______.A. more television films are producedB. man-made fighting has completely taken the place of natural lightC. few films are taken for the cinemaD. oil production has become more important than the film industry

更多“单选题The sentence “Our planet has shrunk” underlined in Paragraph 1 means that __________.A the earth has become physically smallerB the more advanced ways of traveling has made the distance between countries shorterC the traditional concept of our planet h”相关问题

  • 第1题：

    There is only one kind of family on planet Earth today: it is the traditional extended family.()


    参考答案：错误

  • 第2题：

    Passage 2
    If the population of the earth goes on increasing at its present rate, there will eventually not be enough resources left to sustain life on the planet. By the middle of the 21st century, if present trends continue, we will have used up all the oil that drives our cars, for example. Even if scientists develop new ways of feeding the human race, the crowded conditions on earth will make it necessary for us to look for open space somewhere else. But none of the other planets in our solar system are capable of supporting life at present. One possible solution to the problem, however, has recently been suggested by an American scientist, Professor Carl Sagan.
    Sagan believes that before the earth's resources are completely exhausted it will be possible to change the atmosphere of Venus and so create a new world almost as large as earth itself. The difficulty is that Venus is much hotter than the earth and there is only a tiny amount of water there.
    Sagan proposes that algae organisms, which can live in extremely hot or cold atmospheres and at the same time produce oxygen, should be bred in conditions similar to those on Venus. As soon as this has been done, the algae will be placed in small rockets. Spaceships will then fly to Venus and fire the rockets into the atmosphere. In a fairly short time, the algae will break down the carbon dioxide into oxygen and carbon.
    When the algae have done their work, the atmosphere will become cooler, but before man can set foot on Venus it will be necessary for the oxygen to produce rain. The surface of the planet will still be too hot for men to land on it but the rain will eventually fall and in a few years something like earth will be reproduced on Venus.
    On Venus there is a lot of__________.

    A. water
    B. carbon dioxide
    C. carbon monoxide
    D. oxygen

    答案：B
    解析：
    由第--f&的最后一句话中的“there is only a tiny amount ofwater there(Venus)”得知，A选项错误。第三段结尾说明，藻类通过火箭运往金星，然后“In a fairly short time，the algae will break down the carbon dioxide into oxygen and carbon”.说明金星上有大量的二氧化碳。C和D选项错误。故选B。

  • 第3题：

    共用题干
    Earth's Inner Core

    Scientists have long struggled to understand what lies at the planet's center.Direct
    observation of its center is impossible,so researchers must_________(1)to other evidence.
    In 1889,a German scientist detected a severe earthquake in Japan.Geophysicists
    concluded that shock waves_________(2) jolts（晃动）from one side of Earth through
    the center to the other side.Then in 1936,Danish geophysicist lnge Lehmann studied the
    waves' __________ (3) to determine that within Earth's core of molten（熔化了的）iron
    lies a solid inner core一but_________(4) that core was made of eluded（难倒）her.
    Other geophysicists quickly determined that Lehmann's inner core was composed mostly
    _________(5) iron.Since then,Lehmann's discovery has _________(6)
    conventional Earth science.
    But now scientists are challenging traditional theory with new and radical_________
    (7).For example,Earth's center could actually contain an"inner core within the inner
    core."claim lshii and colleague Adam Dziewonski.
    Analyzing hundreds of thousands of earthquake wave _________(8),they
    maintain that the inner core has at its heart a tiny, even more solid sphere（球体）.This
    sphere"may be the oldest fossil_________(9)from the formation of Earth,"says Dziewonski.
    Dziewonski and Ishii speculate that shortly _________(10)Earth formed around
    4.8 billion years ago,a giant asteroid（小行星）smashed into the young planet and nearly
    melted it.But Earth's center didn't quite melt;it_________(11)mass as the planet
    cooled. The core within a core may be the kernel（核心）that endured. " Its presence
    could change our basic ideas about the_________(12)of the planet,"Dziewonski
    says.
    Dziewonski's idea is tame（温和的）compared to the_________( 13 ) theories of
    independent geophysicist J. Marvin Herndon.Earth's inner core is made not of iron,he
    claims,but a_________(14)of nickel and silicon.Herndon has a truly revolutionary
    notion : Within the nickel silicide（硅化物）inner core is also an "inner" inner core一an
    8km-wide ball of the element uranium.Uranium is radioactive.Herndon thinks the uranium
    releases heat energy as its atoms_________(15)fission-split and crash into one
    another in a chain reaction.In other words,we may live on top of a gigantic, "natural"
    nuclear power plant.

    _________(12)
    A:size
    B:origin
    C:structure
    D:shape

    答案：B
    解析：

  • 第4题：

    共用题干
    A Record-Breaking Rover
    NASA's Mars rover Opportunity has boldly gone where no rover has gone before—at least in terms of distance. Since arriving on the Red Planet in 2004,Opportunity has traveled 25 .01 miles,more than any other wheeled vehicle has on another world.
    “This is so remarkable considering Opportunity was intended to drive about 1 kilometer and was never designed for distance,”says John Callas,the Mars Exploration Rover Project Manager.
    He works at NASA's Jet Propulsion Laboratory in Pasadena,California.“But what is really importantly is not how many miles the rover has racked up,but how much exploration and discovery we have accomplished over that distance.”
    The solar-powered Opportunity and its twin rover,Spirit,landed on Mars 10 years ago on a mission expected to last 3 months. The objective of the rovers was to help scientists learn more about the planet and to search for signs of life,such as the possible presence of water.
    Spirit stopped communicating with Earth in March 2010,a few months after it got stuck in a sand pit. But Opportunity has continued to collect and analyze Martian soil and rocks.
    During its mission,Opportunity has captured,and sent back to Earth,some 187,000 panoramic and microscopic images of Mars with its cameras. It has also provided scientists with data on the planet's atmosphere,soil,rocks,aid terrain.
    The rover doesn't seem to be ready to stop just yet. If Opportunity can continue on,it will reach another major investigation site when its odometer hits 26.2 miles. Opportunity has beer working on Mars since January 2004.
    Researchers believe that clay minerals exposed near Marathon Valley could hold clues to Mars's ancient environment. Opportunity's continuing travels will also help researchers as the, plan for an eventual human mission to the Red Planet.

    Which of the following statements is true of Opportunity?
    A: It will come back to earth soon.
    B: Another rover will be sent to replace it.
    C: It is travelling to another major investigation site.
    D: It will work with other rovers exploring Mars.

    答案：C
    解析：
    根据第一段“NASA's Mars rover Opportunity has boldly gone where no rover has gone before—at least in terms of distance.”可知，“机遇号”比任何漫游车行驶的距离都长。故选B。


    从第二、三段可知，“机遇号”并不是为长途行驶而设计的，它本来预定只能行驶大约一千米。因此“机遇号”在被设计时，约翰并没有准确地知道它的价值。故本题选 B。


    由第四段“The objective of the rovers was to help scientists learn more about the planet and to search for signs of life , such as the possible presence of water.”可知，把“机遇号”和 “勇气号”送上火星的目的之一是寻找生命的迹象。故本题选D。


    根据文章最后两段可知，如果“机遇号”继续行驶的话，在它行驶到26.2英里的时候，它就会到达另一个重要的研究场地——马拉松谷，因此C项正确。倒数第二段第一句说，“机遇号”不会止步于此，故A项错误。B、D项文中并未提到。


    由最后一段可知，“机遇号”接下来的工作能够帮助研究人员实施人类最终登陆火星的计划。故B项“科学家正努力把更多的人类送上火星”是正确答案。

  • 第5题：

    共用题干
    A Record-Breaking Rover
    NASA's Mars rover Opportunity has boldly gone where no rover has gone before—at least in terms of distance. Since arriving on the Red Planet in 2004,Opportunity has traveled 25 .01 miles,more than any other wheeled vehicle has on another world.
    “This is so remarkable considering Opportunity was intended to drive about 1 kilometer and was never designed for distance,”says John Callas,the Mars Exploration Rover Project Manager.
    He works at NASA's Jet Propulsion Laboratory in Pasadena,California.“But what is really importantly is not how many miles the rover has racked up,but how much exploration and discovery we have accomplished over that distance.”
    The solar-powered Opportunity and its twin rover,Spirit,landed on Mars 10 years ago on a mission expected to last 3 months. The objective of the rovers was to help scientists learn more about the planet and to search for signs of life,such as the possible presence of water.
    Spirit stopped communicating with Earth in March 2010,a few months after it got stuck in a sand pit. But Opportunity has continued to collect and analyze Martian soil and rocks.
    During its mission,Opportunity has captured,and sent back to Earth,some 187,000 panoramic and microscopic images of Mars with its cameras. It has also provided scientists with data on the planet's atmosphere,soil,rocks,aid terrain.
    The rover doesn't seem to be ready to stop just yet. If Opportunity can continue on,it will reach another major investigation site when its odometer hits 26.2 miles. Opportunity has beer working on Mars since January 2004.
    Researchers believe that clay minerals exposed near Marathon Valley could hold clues to Mars's ancient environment. Opportunity's continuing travels will also help researchers as the, plan for an eventual human mission to the Red Planet.

    It can be inferred from the last paragraph that＿________.
    A: experts know how far Opportunity will make in Mars
    B:.reseachers are working on sending many more humans to Mars
    C: Mars's ancient environment might be exposed with the help of Opportunity
    D: Opportunity is supposed to collect clay minerals from Marathon Valley

    答案：C
    解析：
    根据第一段“NASA's Mars rover Opportunity has boldly gone where no rover has gone before—at least in terms of distance.”可知，“机遇号”比任何漫游车行驶的距离都长。故选B。


    从第二、三段可知，“机遇号”并不是为长途行驶而设计的，它本来预定只能行驶大约一千米。因此“机遇号”在被设计时，约翰并没有准确地知道它的价值。故本题选 B。


    由第四段“The objective of the rovers was to help scientists learn more about the planet and to search for signs of life , such as the possible presence of water.”可知，把“机遇号”和 “勇气号”送上火星的目的之一是寻找生命的迹象。故本题选D。


    根据文章最后两段可知，如果“机遇号”继续行驶的话，在它行驶到26.2英里的时候，它就会到达另一个重要的研究场地——马拉松谷，因此C项正确。倒数第二段第一句说，“机遇号”不会止步于此，故A项错误。B、D项文中并未提到。


    由最后一段可知，“机遇号”接下来的工作能够帮助研究人员实施人类最终登陆火星的计划。故B项“科学家正努力把更多的人类送上火星”是正确答案。

  • 第6题：

    共用题干
    A Record-Breaking Rover
    NASA's Mars rover Opportunity has boldly gone where no rover has gone before—at least in terms of distance. Since arriving on the Red Planet in 2004,Opportunity has traveled 25 .01 miles,more than any other wheeled vehicle has on another world.
    “This is so remarkable considering Opportunity was intended to drive about 1 kilometer and was never designed for distance,”says John Callas,the Mars Exploration Rover Project Manager.
    He works at NASA's Jet Propulsion Laboratory in Pasadena,California.“But what is really importantly is not how many miles the rover has racked up,but how much exploration and discovery we have accomplished over that distance.”
    The solar-powered Opportunity and its twin rover,Spirit,landed on Mars 10 years ago on a mission expected to last 3 months. The objective of the rovers was to help scientists learn more about the planet and to search for signs of life,such as the possible presence of water.
    Spirit stopped communicating with Earth in March 2010,a few months after it got stuck in a sand pit. But Opportunity has continued to collect and analyze Martian soil and rocks.
    During its mission,Opportunity has captured,and sent back to Earth,some 187,000 panoramic and microscopic images of Mars with its cameras. It has also provided scientists with data on the planet's atmosphere,soil,rocks,aid terrain.
    The rover doesn't seem to be ready to stop just yet. If Opportunity can continue on,it will reach another major investigation site when its odometer hits 26.2 miles. Opportunity has beer working on Mars since January 2004.
    Researchers believe that clay minerals exposed near Marathon Valley could hold clues to Mars's ancient environment. Opportunity's continuing travels will also help researchers as the, plan for an eventual human mission to the Red Planet.

    One of the objectives of sending Opportunity and Spirit is to＿________.
    A: collect soil and send back to Earth
    B: develop multinational space exploration
    C:.test how well solar-powered rovers work in outer space
    D: look for the possible presence of life

    答案：D
    解析：
    根据第一段“NASA's Mars rover Opportunity has boldly gone where no rover has gone before—at least in terms of distance.”可知，“机遇号”比任何漫游车行驶的距离都长。故选B。


    从第二、三段可知，“机遇号”并不是为长途行驶而设计的，它本来预定只能行驶大约一千米。因此“机遇号”在被设计时，约翰并没有准确地知道它的价值。故本题选 B。


    由第四段“The objective of the rovers was to help scientists learn more about the planet and to search for signs of life , such as the possible presence of water.”可知，把“机遇号”和 “勇气号”送上火星的目的之一是寻找生命的迹象。故本题选D。


    根据文章最后两段可知，如果“机遇号”继续行驶的话，在它行驶到26.2英里的时候，它就会到达另一个重要的研究场地——马拉松谷，因此C项正确。倒数第二段第一句说，“机遇号”不会止步于此，故A项错误。B、D项文中并未提到。


    由最后一段可知，“机遇号”接下来的工作能够帮助研究人员实施人类最终登陆火星的计划。故B项“科学家正努力把更多的人类送上火星”是正确答案。

  • 第7题：

    单选题
    Stephen Hawking believes that earth is unlikely to be the only planet ______ life has developed gradually.
    A

    that

    B

    where

    C

    which

    D

    whose


    正确答案： D
    解析：
    句意：Stephen Hawking认为，地球不可能是生命逐渐发展的唯一一个星球。the planet在从句中作状语，故要用关系副词where，相当于on which。故答案是B项。

  • 第8题：

    单选题
    The greatest chance for the existence of extraterrestrial life is on a planet beyond our solar system. The Milky Way galaxy alone contains 100 billion other suns, many of which could be accompanied by planets similar enough to Earth to make them suitable abodes of life.　 The statement above assumes which of the following?
    A

    Living creatures on another planet would probably have the same appearance as those on Earth.

    B

    Life cannot exist on other planets in our solar system.

    C

    If the appropriate physical conditions exist, life is an inevitable consequence.

    D

    More than one of the suns in the galaxy is accompanied by an Earth-like planet.

    E

    It is likely that life on another planet would require conditions similar to those on Earth.


    正确答案： E
    解析：
    文段从其他行星与地球环境相似，推出其他行星上有生命存在的结论，所以可知作者暗示生命体的存在需要和地球相类似的生存条件，故本题应选E项。

  • 第9题：

    单选题
    _____ our great surprise, our company has made much more profit than we expected last year.
    A

    For

    B

    In

    C

    With

    D

    To


    正确答案： C
    解析：
    句意：让我们吃惊的是，我们公司的盈利大大超出了我们去年所预计的。本题考查固定搭配。to one’s surprise是固定用法，表示“让某人吃惊的是……”。因此D项正确。

  • 第10题：

    单选题
    Geological evidence suggests that the earth’s magnetic polarity has switched back and forth many times over the millennia; such ______in the magnetic field may affect the ability of our planet to ward off cosmic radiation.
    A

    intensifications

    B

    justifications

    C

    records

    D

    correlations

    E

    fluctuations


    正确答案： E
    解析：
    地球的磁极在过去一千年不断地变换，即为磁极不断变动，fluctuation“变动；起伏”，故选E。correlation是“相关，关联”的意思。

  • 第11题：

    单选题
    _____ from space, our earth, with water covering 70% of its surface, appears as a “blue planet”.
    A

    Seeing

    B

    To be seen

    C

    Seen

    D

    Having seen


    正确答案： C
    解析：
    句意：从太空看，我们的地球表面70%都被水覆盖，看起来像是一个“蓝色的星球”。本题考查非谓语动词用法。主语our earth与see之间是被动关系，应填入过去分词作状语，表示被动意义。因此C项正确。

  • 第12题：

    单选题
    _____from space, our earth, with water covering 70% of its surface, appears as a blue planet.
    A

    Seeing

    B

    To be seen

    C

    Seen

    D

    Having seen


    正确答案： C
    解析：

  • 第13题：

    Our teacher told us that the earth _____ from west to east.

    A、turn

    B、turns

    C、turned

    D、has turned


    正确答案:B

  • 第14题：

    共用题干
    Earth's Inner Core

    Scientists have long struggled to understand what lies at the planet's center.Direct
    observation of its center is impossible,so researchers must_________(1)to other evidence.
    In 1889,a German scientist detected a severe earthquake in Japan.Geophysicists
    concluded that shock waves_________(2) jolts（晃动）from one side of Earth through
    the center to the other side.Then in 1936,Danish geophysicist lnge Lehmann studied the
    waves' __________ (3) to determine that within Earth's core of molten（熔化了的）iron
    lies a solid inner core一but_________(4) that core was made of eluded（难倒）her.
    Other geophysicists quickly determined that Lehmann's inner core was composed mostly
    _________(5) iron.Since then,Lehmann's discovery has _________(6)
    conventional Earth science.
    But now scientists are challenging traditional theory with new and radical_________
    (7).For example,Earth's center could actually contain an"inner core within the inner
    core."claim lshii and colleague Adam Dziewonski.
    Analyzing hundreds of thousands of earthquake wave _________(8),they
    maintain that the inner core has at its heart a tiny, even more solid sphere（球体）.This
    sphere"may be the oldest fossil_________(9)from the formation of Earth,"says Dziewonski.
    Dziewonski and Ishii speculate that shortly _________(10)Earth formed around
    4.8 billion years ago,a giant asteroid（小行星）smashed into the young planet and nearly
    melted it.But Earth's center didn't quite melt;it_________(11)mass as the planet
    cooled. The core within a core may be the kernel（核心）that endured. " Its presence
    could change our basic ideas about the_________(12)of the planet,"Dziewonski
    says.
    Dziewonski's idea is tame（温和的）compared to the_________( 13 ) theories of
    independent geophysicist J. Marvin Herndon.Earth's inner core is made not of iron,he
    claims,but a_________(14)of nickel and silicon.Herndon has a truly revolutionary
    notion : Within the nickel silicide（硅化物）inner core is also an "inner" inner core一an
    8km-wide ball of the element uranium.Uranium is radioactive.Herndon thinks the uranium
    releases heat energy as its atoms_________(15)fission-split and crash into one
    another in a chain reaction.In other words,we may live on top of a gigantic, "natural"
    nuclear power plant.

    _________(1)
    A:try
    B:leave
    C:turn
    D:point

    答案：C
    解析：

  • 第15题：

    And that quest has brought______benefits that improve our lives in countless ways.

    A.tangible
    B.displayed
    C.conditional
    D.proved

    答案：A
    解析：
    本题考查近义词辨析。题目意为“而这一追求带来了实实在在的好处，以无数方式改善了我们的生活”。A选项“有形的”，B选项“陈列，展示”，C选项“有条件的”，D选项“试验，检验”。根据题干，tangible benefits为固定搭配，意为“切实利益”，故A选项符合题意。
    　　

  • 第16题：

    共用题干
    A Record-Breaking Rover
    NASA's Mars rover Opportunity has boldly gone where no rover has gone before—at least in terms of distance. Since arriving on the Red Planet in 2004,Opportunity has traveled 25 .01 miles,more than any other wheeled vehicle has on another world.
    “This is so remarkable considering Opportunity was intended to drive about 1 kilometer and was never designed for distance,”says John Callas,the Mars Exploration Rover Project Manager.
    He works at NASA's Jet Propulsion Laboratory in Pasadena,California.“But what is really importantly is not how many miles the rover has racked up,but how much exploration and discovery we have accomplished over that distance.”
    The solar-powered Opportunity and its twin rover,Spirit,landed on Mars 10 years ago on a mission expected to last 3 months. The objective of the rovers was to help scientists learn more about the planet and to search for signs of life,such as the possible presence of water.
    Spirit stopped communicating with Earth in March 2010,a few months after it got stuck in a sand pit. But Opportunity has continued to collect and analyze Martian soil and rocks.
    During its mission,Opportunity has captured,and sent back to Earth,some 187,000 panoramic and microscopic images of Mars with its cameras. It has also provided scientists with data on the planet's atmosphere,soil,rocks,aid terrain.
    The rover doesn't seem to be ready to stop just yet. If Opportunity can continue on,it will reach another major investigation site when its odometer hits 26.2 miles. Opportunity has beer working on Mars since January 2004.
    Researchers believe that clay minerals exposed near Marathon Valley could hold clues to Mars's ancient environment. Opportunity's continuing travels will also help researchers as the, plan for an eventual human mission to the Red Planet.

    Opportunity is a record breaking rover in the sense of________.
    A: how long is has stayed in space
    B: how far it has traveled
    C: how much investment it has involved
    D: how many facilities it has been equipped with

    答案：B
    解析：
    根据第一段“NASA's Mars rover Opportunity has boldly gone where no rover has gone before—at least in terms of distance.”可知，“机遇号”比任何漫游车行驶的距离都长。故选B。


    从第二、三段可知，“机遇号”并不是为长途行驶而设计的，它本来预定只能行驶大约一千米。因此“机遇号”在被设计时，约翰并没有准确地知道它的价值。故本题选 B。


    由第四段“The objective of the rovers was to help scientists learn more about the planet and to search for signs of life , such as the possible presence of water.”可知，把“机遇号”和 “勇气号”送上火星的目的之一是寻找生命的迹象。故本题选D。


    根据文章最后两段可知，如果“机遇号”继续行驶的话，在它行驶到26.2英里的时候，它就会到达另一个重要的研究场地——马拉松谷，因此C项正确。倒数第二段第一句说，“机遇号”不会止步于此，故A项错误。B、D项文中并未提到。


    由最后一段可知，“机遇号”接下来的工作能够帮助研究人员实施人类最终登陆火星的计划。故B项“科学家正努力把更多的人类送上火星”是正确答案。

  • 第17题：

    共用题干
    A Record-Breaking Rover
    NASA's Mars rover Opportunity has boldly gone where no rover has gone before—at least in terms of distance. Since arriving on the Red Planet in 2004,Opportunity has traveled 25 .01 miles,more than any other wheeled vehicle has on another world.
    “This is so remarkable considering Opportunity was intended to drive about 1 kilometer and was never designed for distance,”says John Callas,the Mars Exploration Rover Project Manager.
    He works at NASA's Jet Propulsion Laboratory in Pasadena,California.“But what is really importantly is not how many miles the rover has racked up,but how much exploration and discovery we have accomplished over that distance.”
    The solar-powered Opportunity and its twin rover,Spirit,landed on Mars 10 years ago on a mission expected to last 3 months. The objective of the rovers was to help scientists learn more about the planet and to search for signs of life,such as the possible presence of water.
    Spirit stopped communicating with Earth in March 2010,a few months after it got stuck in a sand pit. But Opportunity has continued to collect and analyze Martian soil and rocks.
    During its mission,Opportunity has captured,and sent back to Earth,some 187,000 panoramic and microscopic images of Mars with its cameras. It has also provided scientists with data on the planet's atmosphere,soil,rocks,aid terrain.
    The rover doesn't seem to be ready to stop just yet. If Opportunity can continue on,it will reach another major investigation site when its odometer hits 26.2 miles. Opportunity has beer working on Mars since January 2004.
    Researchers believe that clay minerals exposed near Marathon Valley could hold clues to Mars's ancient environment. Opportunity's continuing travels will also help researchers as the, plan for an eventual human mission to the Red Planet.

    What does John Callas say about Opportunity's long distance travel?
    A: It hasn't met scientists' expectation yet
    B: It hasn't been appreciated appropriately
    C: It is secondary to what has been discovered
    D:.It is what scientists have been aiming at

    答案：B
    解析：
    根据第一段“NASA's Mars rover Opportunity has boldly gone where no rover has gone before—at least in terms of distance.”可知，“机遇号”比任何漫游车行驶的距离都长。故选B。


    从第二、三段可知，“机遇号”并不是为长途行驶而设计的，它本来预定只能行驶大约一千米。因此“机遇号”在被设计时，约翰并没有准确地知道它的价值。故本题选 B。


    由第四段“The objective of the rovers was to help scientists learn more about the planet and to search for signs of life , such as the possible presence of water.”可知，把“机遇号”和 “勇气号”送上火星的目的之一是寻找生命的迹象。故本题选D。


    根据文章最后两段可知，如果“机遇号”继续行驶的话，在它行驶到26.2英里的时候，它就会到达另一个重要的研究场地——马拉松谷，因此C项正确。倒数第二段第一句说，“机遇号”不会止步于此，故A项错误。B、D项文中并未提到。


    由最后一段可知，“机遇号”接下来的工作能够帮助研究人员实施人类最终登陆火星的计划。故B项“科学家正努力把更多的人类送上火星”是正确答案。

  • 第18题：

    我们的重吊杆已经长时间不用了。（）

    • A、Our derrick has been out of use for a long time.
    • B、Our heavy derrick has been out of use for a long time.
    • C、Our crane has been out of use for a long time.
    • D、Our winch has been out of use for a long time.

    正确答案:B

  • 第19题：

    单选题
    The sentence “Our planet has shrunk” underlined in Paragraph 1 means that.
    A

    the earth has become physically smaller

    B

    the more advanced ways of traveling has made the distance between countries shorter

    C

    the traditional concept of our planet has become out-of-date

    D

    modern means of communication has made it much easier for people to communicate with each other from different parts of the world


    正确答案： B
    解析：
    语义题。前一句指出“新科技以前所未有的形式将这个世界连接起来”。后一句又接着进行解释说“现在的世界变成了一个‘地球村’，因为电话、传真或卫星的连结，各国之间的联系在数秒之内便可完成”。由此可知划线部分“我们的星球‘缩小’了”指的是“现代通讯方式使得世界各地的人们之间的交流更方便了”。

  • 第20题：

    单选题
    The sentence “But this has rarely been a one-way street.” in the last paragraph means that _____.
    A

    contemporary art has been nourished by modern science

    B

    modern science has been nourished by art

    C

    artists can become scientists and scientists can become artists

    D

    the impacts of modern art and science are actually mutual


    正确答案： B
    解析：
    此题考查的是对句意的理解。这句话的意思是“但这几乎从来就不是单行道”。联系上下文可知，这句话是说明科学与艺术之间的影响是相互的，不是单方面的。D项的mutual一词意思是“相互的”，正确表达了句意，故选D。A项和B项的说法不全面。C项意思是艺术家可以成为科学家，科学家也可以成为艺术家，理解错误。

  • 第21题：

    单选题
    ______ our great surprise, our company has made much more profit than we expected lastyear.
    A

    For

    B

    In

    C

    With

    D

    To


    正确答案： A
    解析：
    句意：让我们吃惊的是，我们公司的盈利大大超出了我们去年所预计的。本题考查固定搭配。to one’s surprise是固定用法，表示“让某人吃惊的是……”。因此D项正确。

  • 第22题：

    单选题
    Is _____ 48 hours _____ the man-made satellite _____ is made in our country to orbit the planet around?
    A

    it; that; where

    B

    it; when; what

    C

    it for; that it takes; that

    D

    it; that it takes; which


    正确答案： C
    解析：
    把题干变成陈述句应该是这样：It is（48 hours）that it takes the man made satellite（made in our country）to orbit the planet around.其实这句话就是上面两个句型的结合。句型“It takes sb. some time to do sth”意为“某人花多长时间做某事”。强调句型是“It is＋被强调部分＋that…”。

  • 第23题：

    单选题
    What has happened in the past half-century?
    A

    The population of 15 countries has reduced by more than half.

    B

    Many countries have made unprecedented economic progress.

    C

    Many countries are still struggling with underdevelopment.

    D

    Urbanization has been taking place at a fast pace.


    正确答案： D
    解析：
    录音开头指出在过去的半个世纪，整个世界取得了前所未有的经济成果，上一代还在与落后做斗争的国家现在成为充满朝气的全球经济活动和国内繁荣的中心，因此选项B符合录音内容。

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