职称英语考试综合类(C级)试题及答案

02年职称英语考试综合类(C级)试题及答案6

第三篇 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 rives, 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(冰山).Even worse,some of it has been polluted.

At the moment，this small amount of fresh water is still enough for us . However，our for water is increasing rapidly.Only if we take steps to deal with this problem now can we avoid a severe worldwide water shonage 1ateron．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 dtake is to develop ways of reusing it.Experiments have already been done in this field ,but donly 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 sill 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 dtake 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 “you”． B “man”． C “woman”. D “they”．

42 What percentage of the earth’s water can man actually use at present? A Less than 3 per cent. B Nearly 75 per cent． C About 97 per cent． D Exactly3 per cent.

43According to the passage we can avoid a worldwide water shortage in the future by

A increasing rainfall．

B cutting down our consumption of water. C reusing water and utmzing sea-waterl.

D reducing the number of factories producing steel.

44 Which of the following starements，according to the passage，is NOT true? A A 1imited water supply will affect industrial production． B Purified water is not exactly as fresh as spring water. C Every lagge city purifies and reusesits 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 drying it up． D taking salt out of it.