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职称英语综合类C级阅读理解题精选(3)

2010-05-13 17:29  来源:     我要纠错 打印 收藏   

A Thirsty World

  The world is not only hungry, it is also thirsty for water. This may seem strange to you, since nearly 75% of the earth's surface is covered with water. But about 97% of this huge amount is sea-water, or salt water. Man can only drink and use the other 3% - the fresh water that comes from rivers, lakes, underground, and other sources. And we cannot even use all of that, because some of it is in the form of icebergs (冰山) and glaciers (冰川). Even worse, some of it has been polluted.

  At the moment, this small amount of fresh water is still enough for us. However, our need for water is increasing rapidly. Only if we take steps to deal with this problem now can we avoid a severe worldwide water shortage later on. A limited water supply would have a bad effect on agriculture and industry.

  In addition to stopping wasting our precious water, one useful step we should take is to develop ways of reusing it. Experiments have already been done in this field, but only on a small scale.

  Today, in most large cities, water is used only once and it eventually returns to the sea or runs into underground storage tanks. But it is possible to pipe water that has been used to a purifying (净化) plant. There it can be filtered (过滤) and treated with chemicals so that it can be used again just as if it were fresh from a spring.

  But even if every large city purified and reused its water, we still would not have enough. Where could we turn next? To the oceans! All we'd have to do to make use of the vast amount of sea-water is - remove the salt. This salt-removing process is already in use in many parts of the world.

  So if we take all these steps, we'll be in no danger of drying up!

  41 The phrase "the world" in the first line of the passage refers to
    A "man".
    B "you".
    C "woman".
    D "they".

  42 What percentage of the earth's water can man actually use at present?

    A Nearly 75 percent.
    B About 97 per cent.
    C Exactly 3 per cent.
    D Less than 3 per cent.

  43 According to the passage, we can avoid a worldwide water shortage in the future by
    A increasing rainfall.
    B reusing water and utilizing sea-water.
    C cutting down our consumption of water.
    D reducing the number of factories producing steel.

  44 Which of the following statements, according to the passage, is NOT true?
    A A limited water supply will affect industrial production.
    B Every large city purifies and reuses its water.
    C Purified water is not exactly as fresh as spring water.
    D Oceans are the largest water source.

  45 According to the passage, sea-water can be turned into fresh water by
    A heating it up.
    B treating it with chemicals.
    C taking salt out of it.
    D drying it up.

  <参考答案>

  41. A  42. D  43. B  44. B  45. C

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