首页
登录
职称英语
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
8
管理
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] The third paragraph is concerned with ______.
选项
A、how clouds rise in the air
B、how rain is formed
C、why water-vapor can float in the air
D、how clouds cause rain
答案
B
解析
要找出该题的答案关键在于分析第三段的篇章结构。不同于常见的段落,该段的主题句This is the cause of rain位于段末。抓住了这句话就明白了该段的中心内容。
转载请注明原文地址:https://www.tihaiku.com/zcyy/3486905.html
相关试题推荐
Thereisabodyofliteraturemakingforecasts-mostofthembelievable-about
Thereisabodyofliteraturemakingforecasts-mostofthembelievable-about
Thereisabodyofliteraturemakingforecasts-mostofthembelievable-about
Thereisabodyofliteraturemakingforecasts-mostofthembelievable-about
Thereisabodyofliteraturemakingforecasts-mostofthembelievable-about
Thereisabodyofliteraturemakingforecasts-mostofthembelievable-about
Thereisabodyofliteraturemakingforecasts-mostofthembelievable-about
Thereisabodyofliteraturemakingforecasts-mostofthembelievable-about
Thereisabodyofliteraturemakingforecasts-mostofthembelievable-about
Thereisabodyofliteraturemakingforecasts-mostofthembelievable-about
随机试题
[originaltext]M:So,whatareyourthoughtsonthisproject?Tobehonest,I’m
[originaltext]W:Ourtopictodayisaboutsomethingthatforeignersnearlyalwa
There’ssomethingabouttheInternetthatcanbringoutmeannessinteenager
工作中有一些抱怨是正常的事,但是你有一位同事不是针对大的问题、基本问题或者原则问
安装在轻钢龙骨上的纸面石膏板,可作为燃烧性能为哪一级的装饰材料使用?()A.
连续式平整度仪测定后,可按每()间距采集的位移值自动计算得每()计算
女,6岁,因反复水肿、尿少4周入院。查:血压90/68mmHg,尿蛋白+++,尿
小翠是初中一年级学生,个性内向,不爱讲话。在家由于父亲脾气暴躁,对她不是打就是骂
男性,28岁,无意中发现甲状腺肿块15天,近3天来似有增大,Tc扫描表示"冷结节
男性,85岁,右侧股骨颈头下骨折,明显移位,下列哪种处理方法正确() A.先行
最新回复
(
0
)