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One way of preventing floods may be by making rain ! This may sound rather s
One way of preventing floods may be by making rain ! This may sound rather s
游客
2024-02-27
41
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问题
One way of preventing floods may be by making rain ! This may sound rather strange. As we know, heavy rain is the cause of floods, and in Malaysia most of the floods are caused by the annual monsoon (季风), which brings heavy rain to the east coast. If, however, the rain could be made to fall in the China Sea, there would be no more floods since the rain clouds would not reach the east coast.
Is it possible to make clouds give up their rain.? Yes, it is, and in 1973 the National Institute of Scientific and Industrial Research (NISIR) suggested that it would be tried. The institute knew of course that it is not possible to make all clouds give up all their rain. It calculated, however, that if the frequency of rainfall could be reduced by 10%, a/id the amount of rain that fell each time could be reduced by 15%, the total amount of flood damage would be reduced by 40%—50%.
As you probably know, clouds are caused by air containing water-vapor. The air rises and, since water-vapor becomes water when it cools, very tiny drops of water are formed. Since these drops are, very small, they float in the air, and form a cloud. When the cloud rises, however, the drops become colder. Because of this, they join together and become big drops. The big drops are no longer able to float be cause of their size, and they fall. As they fall, they pick up more drops and become bigger. This is the cause of rain. [br] Which of the following statements is NOT TRUE?
选项
A、It is likely to cause all clouds to give up all their rain.
B、The frequency of rainfall could be cut down, and so could the amount of rainfall.
C、In Malaysia, the monsoon often results in floods.
D、If people found ways of reducing the amount of rainfall, there would be less flood damage.
答案
A
解析
从原文第二段可知A项与原文不符。B、C、D三项所述内容分别可在原文的第一段和第二段中找到。
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