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
32
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] What does "it" of "since water-vapor becomes water when it cools" in Para. 3. refer to?
选项
A、Water-vapor.
B、Cloud.
C、Water.
D、Air.
答案
D
解析
要弄清楚该句中的指代关系,就必须正确理解文章第三段的内容——雨是如何形成的。云是由含有水蒸气的空气形成的。空气不断上升、冷却,水蒸气变成小水滴。当水滴越变越大,再也无法飘浮在空中时就变成了雨。由此可知句中的it指的是空气。
转载请注明原文地址:https://tihaiku.com/zcyy/3486904.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
Therearethreeseparatesourcesofhazard【C1】______totheuseofnuclearre
Choosethecorrectletter,A,BorC.Planningapresentationonnanotechnology
[originaltext]W:James,what’syouropinionaboutnuclearenergy?M:Nuclearen
若要传输速率为7200B的数据流,所需要的最小传输带宽为()A.2.4kH
填充墙砌体的灰缝砂浆应饱满,其饱满度应达到()以上。A.60% B.70%
A.出血证 B.遗精盗汗证 C.胁肋脘腹疼痛 D.痈疽疮疡证 E.虚劳喘
一般来说,一个社会的监督体系是由多方面力量组成的,媒体监督不应成为其中的主要力量
下列各项中,应填列于中央银行资产负债表中负债方的是()。A.外汇储备
田某是间歇性精神病患者,病情发作时,用棍棒殴打李某。李某被迫反击,将田某打倒在地
关于混凝土模板及支架拆除,正确的说法是()。A.梁侧模拆除时对混凝土强度无
最新回复
(
0
)