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    24．A．used B．brought C．discovered D．developed 【查看更多】

     

    题目列表(包括答案和解析)

    Across countryside, non-food crops are growing alongside wheat．Some are used in new alternatives to plastics and other materials, but others will simply be burned．
    Burning crops is becoming more popular because it is good for the planet．Doing so is also cheaper than burning fossil fuels．As more land is devoted to non-food crop production, the economics of crops for fuel are likely to become even more favorable．
    Humans have been burning such biomass—organic materials from plants or animals— since they discovered fire．But that burning fossil fuels could have catastrophic consequences has brought biomass back into fashion．
    Even allowing for emissions (排放) of carbon dioxide from fuel used in planting, harvesting, processing and transporting biomass fuel, replacing fossil fuel with biomass can typically reduce greenhouse gas emissions by more than 90 percent．
    Power stations around the world are experimenting with forms of biomass to add to their coal or oil, with encouraging results．Indeed, power companies could profit by turning to biomass, especially when the subsidies (补助) many governments offer for using renewable energy are taken into account．
    Farmers can benefit from growing biomass．In Europe, the reduction of subsidies for certain crops is exposing farmers to market forces．Instead of being paid for whatever they produce, farmers must seek a clear demand for their product．Many believe that the demand for alternatives to fossil fuels could be just such a driver．
    But while biomass offers a variety of potential alternatives, the world's infrastructure (基础设施） has developed around burning fossil fuels to such a stage that switching to biomass involves a change in conception that many companies have not accepted．
    Also, there are problems with using biomass．Although most coal-fired power stations could take a small amount of their fuel from biomass without significant adjustment, few are built to run on biomass alone．Burning some forms of biomass also causes environmental problems．Oils and waste can be smelly, while wood produces smoke unless burned properly．
    The supply chains for fossil fuels are set up well, but those for biomass are just the beginning. Sources of supply for biomass rely on farm production and can therefore be less reliable. They are necessarily limited and it wouldn't make sense to turn a very large amount of valuable agricultural land away from food crops．But as the world adjusts to the need to control greenhouse gas emissions, these problems may receive more attention．

    1. 1.

      What do we know about biomass?

      1. A.
        It is a useful way of burning crops．
      2. B.
        It is plant and animal matter used to provide power．
      3. C.
        It is a new alternative to be used widely．
      4. D.
        It is a popular approach to fighting against pollution．
    2. 2.

      What are the advantages of using biomass?
      a．It gives off less greenhouse gases．
      b．It helps farmers receive subsidies for what they produce．
      c．It has met the clear demand for energy．
      d．It has brought subsidies for some power companies．
      e．It is cheaper than burning fossil fuels．

      1. A.
        a, b, c
      2. B.
        b, c, d
      3. C.
        c, d, e
      4. D.
        a, d, e
    3. 3.

      For coal-fired power stations, ______．

      1. A.
        more effective ways to use biomass have been tried
      2. B.
        using renewable energy has become their daily task
      3. C.
        burning biomass alone would require considerable changes
      4. D.
        setting up dependable supply channels needs governments' support
    4. 4.

      What is the author's attitude towards biomass fuels?

      1. A.
        Defensive．
      2. B.
        Doubtful．
      3. C.
        Negative．
      4. D.
        Objective

    查看答案和解析>>

    阅读理解

    　　Then by chance, Darwin read a book by Malthus, an Englishman．The book was forty years old, and Malthus was already dead．But it suddenly pushed Darwin nearer to some answers．Malthus said, “The number of people in the world can grow very quickly．Just think, a man and his wife could have ten children．When these ten grow up, every one of them could have ten more children．So now we have a hundred children．Again, if every one of these has ten children, we will have a thousand children and this can continue．We will have more and more people．”

    　　All this could happen．But did it? Malthus said, “No．It doesn’t happen in the real world．The number of people remains almost the same．Why? The reason is this．We just can’t grow food quickly enough．Soon there’s not enough food．So some people can’t eat．They die before they bring any more children into the world．”

    　　These ideas came at just the right time for Darwin．He asked one more question：Which people will die before they have children? For Malthus, this was not an important question．But for Darwin, it was very important．

    　　He asked, “Which people will have children? Why does this man have children, and why does that man not have any? ”And soon of course he was thinking of the Galapagos finches(雀类鸟)again．

    　　“The number of finches remains almost the same．So usually two birds must give us only two new birds．But a finch lays more than two eggs．Which two young birds will live, and give us more eggs? Which will not?”

    　　The answer is some birds can’t get enough food－they will die．But why can’t they get enough? Why are some birds better than them? The birds in one family are not quite the same．Some are stronger, some are quicker, some are bigger, some have longer beaks, some have lighter bodies．The best birds will live．

    　　And always an answer brought with a question：What is “best”? Darwin now had his list of facts and questions, answers and ideas．Could he put them together and make a clear story? Could he explain the evolution(进化)of the finches?

    　　He could and he did．

    (1)

    What are the general differences between Darwin and Malthus according to the passage?

    [　　]

    A．

    Darwin thought of the evolution while Malthus considered the starvation．

    B．

    Malthus believed that more food was needed for more people while Darwin found the answer to the problem of how to keep the “best one”．

    C．

    Darwin concluded “the survival of the fittest”, while Malthus made it clear that the lack of food might prevent the increase of population．

    D．

    Malthus felt it important for people to live better while Darwin supposed it more important for birds to have more young ones．

    (2)

    What is Malthus’ point of view about the problem of population?

    [　　]

    A．

    It is natural for the population to increase without any plan．

    B．

    It is unnecessary to make people have fewer children．

    C．

    Some people could not have fewer children because of the lack of food．

    D．

    The number of people would remain almost the same if the food conditions would not change．

    (3)

    What was the result of Darwin’s research?

    [　　]

    A．

    He wanted to find out why some birds can live better while some others cannot．

    B．

    He only made an answer to the question “What is the best?”

    C．

    He explained the evolution of the finches through his observation(观察)．

    D．

    He discovered a lot more “Whys” than Malthus did．

    (4)

    Which of the following is TRUE?

    [　　]

    A．

    Darwin developed his theory with the help of Malthus’．

    B．

    Darwin agreed completely with Malthus．

    C．

    Darwin held the same opinion that lack of food made people have fewer children．

    D．

    Darwin used finches to do experiments before using people．

    (5)

    From the passage we can find out the author ________．

    [　　]

    A．

    preferred talking about Darwin to Malthus

    B．

    just gave some facts of scientists’ research work without any comments(评论)

    C．

    thought Malthus’ book led Darwin to the scientific research of the birds

    D．

    believed Darwin had done much more research work than Malthus ever did

    查看答案和解析>>


    III. Cloze test 完形填空 1’ * 20 = 20’
    阅读下面短文，掌握其大意，然后从26－45各题所给的四个选项（A、B、C和D）中选出能填入相应空白处的最佳选项。
    People from Great Britain brought the English language to North America in the 16th and 17th centuries. And in the  36  300 years, there were  37  many changes in  38  places that now people can  39  tell an English person  40  an American in the way he or she talks.
    Many old words  41  in England but were kept in America. For example, 300 years ago people in Great Britain got their water from something they called either a
    “faucet”, a “spigot”, or a “tap”. All these words are  42  heard in different parts of America, but only “tap” is still common in  43 . Americans often made up new words or changed old  44 . “Corn” is one kind of plant in America and  45  in England.
    Also, over the last three centuries the English language  46  thousands of new words for things that weren’t known  47 . And often, American and English people used two  48  names for them. A tin can (洋铁罐头) is called “tin” for short in England, but a “can” in America. The word “radio” is  49  all over the world, including America. But many English people call it a “wireless”. And almost anything having something to do  50  cars, railroads, etc.  51  different names in British and American English．
    But now American and British English may be growing closer together. One  52  is the large amount (数量) of American speech that British people hear daily in movies, on television, or  53  travelers.  54  this, Americans seem to be influencing (影响) the British more and more. So some day, English may even be  55  on both sides of the Atlantic (大西洋).  
    36．A. following     B. recent       C. oldest        D. last
    37．A. such              B. too                C. so                 D. great
    38．A. either            B. both               C. neither          D. two
    39．A. hardly            B. difficulty        C. clearly          D. easily
    40．A. with              B. from                C. to               D. and
    41．A. disappeared   B. were disappeared   C. spoke   D. were spoken
    42．A. not                B. hardly              C. yet             D. still
    43．A. America         B. the two countries   C. England     D. British
    44．A. word              B. forms              C. ones             D. ways
    45．A. another           B. also planted     C. a plant        D. a kind of food
    46．A. added          B. has added            C. discovered     D. has discovered
    47．A. anywhere    B. in some countries  C. before     D. for centuries
    48．A. new              B. short                 C. different      D. surprising
    49．A. produced       B. made                 C. developed      D. used
    50．A. to                B. away                 C. with             D. from
    51．A. has              B. have                 C. has given       D. was given
    52．A. thing           B. cause                C. reason           D. expression
    53．A. from            B. through             C. on                D. by
    54．A. For              B. Because             C. Besides         D. Because of
    55．A. different         B. more different   C. the same         D. more useful

    查看答案和解析>>

    III. Cloze test 完形填空 1’ * 20 = 20’

    阅读下面短文，掌握其大意，然后从26－45各题所给的四个选项（A、B、C和D）中选出能填入相应空白处的最佳选项。

    People from Great Britain brought the English language to North America in the 16th and 17th centuries. And in the  36  300 years, there were  37  many changes in  38  places that now people can  39  tell an English person  40  an American in the way he or she talks.

    Many old words  41  in England but were kept in America. For example, 300 years ago people in Great Britain got their water from something they called either a

    “faucet”, a “spigot”, or a “tap”. All these words are  42  heard in different parts of America, but only “tap” is still common in  43 . Americans often made up new words or changed old  44 . “Corn” is one kind of plant in America and  45  in England.

    Also, over the last three centuries the English language  46  thousands of new words for things that weren’t known  47 . And often, American and English people used two  48  names for them. A tin can (洋铁罐头) is called “tin” for short in England, but a “can” in America. The word “radio” is  49  all over the world, including America. But many English people call it a “wireless”. And almost anything having something to do  50  cars, railroads, etc.  51  different names in British and American English．

    But now American and British English may be growing closer together. One  52  is the large amount (数量) of American speech that British people hear daily in movies, on television, or  53  travelers.  54  this, Americans seem to be influencing (影响) the British more and more. So some day, English may even be  55  on both sides of the Atlantic (大西洋).  

    36．A. following     B. recent       C. oldest        D. last

    37．A. such              B. too                C. so                 D. great

    38．A. either            B. both               C. neither          D. two

    39．A. hardly            B. difficulty        C. clearly          D. easily

    40．A. with              B. from                C. to               D. and

    41．A. disappeared   B. were disappeared   C. spoke   D. were spoken

    42．A. not                B. hardly              C. yet             D. still

    43．A. America         B. the two countries   C. England     D. British

    44．A. word              B. forms              C. ones             D. ways

    45．A. another           B. also planted     C. a plant        D. a kind of food

    46．A. added          B. has added            C. discovered     D. has discovered

    47．A. anywhere    B. in some countries  C. before     D. for centuries

    48．A. new              B. short                 C. different      D. surprising

    49．A. produced       B. made                 C. developed      D. used

    50．A. to                B. away                 C. with             D. from

    51．A. has              B. have                 C. has given       D. was given

    52．A. thing           B. cause                C. reason           D. expression

    53．A. from            B. through             C. on                D. by

    54．A. For              B. Because             C. Besides         D. Because of

    55．A. different         B. more different   C. the same         D. more useful

     

    查看答案和解析>>

    III. Cloze test 完形填空 1’ * 20 = 20’

        阅读下面短文，掌握其大意，然后从26－45各题所给的四个选项（A、B、C和D）中选出能填入相应空白处的最佳选项。

        People from Great Britain brought the English language to North America in the 16th and 17th centuries. And in the  36  300 years, there were  37  many changes in  38  places that now people can  39  tell an English person  40  an American in the way he or she talks.

        Many old words  41  in England but were kept in America. For example, 300 years ago people in Great Britain got their water from something they called either a

    “faucet”, a “spigot”, or a “tap”. All these words are  42  heard in different parts of America, but only “tap” is still common in  43 . Americans often made up new words or changed old  44 . “Corn” is one kind of plant in America and  45  in England.

        Also, over the last three centuries the English language  46  thousands of new words for things that weren’t known  47 . And often, American and English people used two  48  names for them. A tin can (洋铁罐头) is called “tin” for short in England, but a “can” in America. The word “radio” is  49  all over the world, including America. But many English people call it a “wireless”. And almost anything having something to do  50  cars, railroads, etc.  51  different names in British and American English．

    But now American and British English may be growing closer together. One  52  is the large amount (数量) of American speech that British people hear daily in movies, on television, or  53  travelers.  54  this, Americans seem to be influencing (影响) the British more and more. So some day, English may even be  55  on both sides of the Atlantic (大西洋).  

    36．A. following     B. recent       C. oldest        D. last

    37．A. such              B. too                C. so                 D. great

    38．A. either            B. both               C. neither          D. two

    39．A. hardly            B. difficulty        C. clearly          D. easily

    40．A. with              B. from                C. to               D. and

    41．A. disappeared   B. were disappeared   C. spoke   D. were spoken

    42．A. not                B. hardly              C. yet             D. still

    43．A. America         B. the two countries   C. England     D. British

    44．A. word              B. forms              C. ones             D. ways

    45．A. another           B. also planted     C. a plant        D. a kind of food

    46．A. added          B. has added             C. discovered     D. has discovered

    47．A. anywhere    B. in some countries  C. before     D. for centuries

    48．A. new              B. short                 C. different      D. surprising

    49．A. produced       B. made                 C. developed      D. used

    50．A. to                B. away                 C. with             D. from

    51．A. has              B. have                 C. has given       D. was given

    52．A. thing           B. cause                C. reason           D. expression

    53．A. from            B. through             C. on                D. by

    54．A. For              B. Because             C. Besides         D. Because of

    55．A. different         B. more different   C. the same         D. more useful

    查看答案和解析>>


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