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
2023-07-26
82
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://tihaiku.com/zcyy/2870641.html
相关试题推荐
Inthistechnicalbusinessworld,theprocessofmanagementdecision-making
Inthistechnicalbusinessworld,theprocessofmanagementdecision-making
Inthistechnicalbusinessworld,theprocessofmanagementdecision-making
Inthistechnicalbusinessworld,theprocessofmanagementdecision-making
Inthistechnicalbusinessworld,theprocessofmanagementdecision-making
Inthistechnicalbusinessworld,theprocessofmanagementdecision-making
Inthistechnicalbusinessworld,theprocessofmanagementdecision-making
Onewayofpreventingfloodsmaybebymakingrain!Thismaysoundrathers
Ithasbeenrathercostlytoinstallthemachinery,but______(从长远来看这些钱是值得花的)。in
Participationinhighschoolsportsisnotaconstitutionalright.Rather,i
随机试题
Whattypeofbusinessdoesthespeakerhave?[br][originaltext]I’mhonoredto
Wheredoestheconversationprobablytakeplace?[originaltext](M=man,W=wom
TheImpossibilityofRapidEnergyTransitions[A]Politiciansare
某桥梁工程,其基础为钻孔桩。为了保证工程质量,项目经理部组成了以总工程师为组长的
下列关于高层建筑加压送风系统的设计要求,正确的是()。A.防烟楼梯间正压为4
胃溃疡病的合并症最常见的是:A.梗阻 B.穿孔 C.出血 D.癌变
以下关于义务教育的叙述正确的是() A.国家收取学费,不收取杂费 B.适龄
2008年金融危机之后,伴随信息技术及其创新应用进入迸发期,分享经济快速成长,2
下列承包商增加的人工费中,可以向业主索赔的有( )。A.特殊恶劣气候导致的人员
B
最新回复
(
0
)