首页
登录
职称英语
[originaltext] The winds of a tornado are the most violent and destructive o
[originaltext] The winds of a tornado are the most violent and destructive o
游客
2024-05-01
37
管理
问题
The winds of a tornado are the most violent and destructive ones on Earth. Any of you who have seen one knows very well how frightening and powerful they are. What’s interesting about them is that scientists don’t actually know exactly why tornadoes occur.
We do know, however, what happens when tornadoes are formed. As you remember, a front occurs when cool, dry air from the north meets warm, humid air coming from the south. Where these air masses meet, a narrow zone of storm clouds develops, and thunderstorms, and sometimes tornadoes, occur.
How is this violent weather produced? Well, a mass of warm, humid air rises very rapidly. As it rises, more warm air rushes in to replace it. This inrushing air also rises, and in some cases, especially when there is extreme thermal instability, begins to rotate. When this happens, the rotating air forms a tornado.
Even if you’ve seen tornadoes only in movies, you know that they can destroy buildings in seconds. This is possible because when a tornado passes over a house, it sucks up air from around the house and so the air pressure outside the house drops rapidly. Inside, pressure remains the same. So, air pressure inside is greater than air pressure outside. The result is that the building explodes outward. Next, we’ll talk a little bit about how new technological developments are being used to try to predict tornadoes.
16. What does the speaker say about the scientists?
17. In what way does a narrow zone of storm clouds develop?
18. What will happen to a building when air pressure inside is greater than outside?
选项
A、They are very frightening and powerful.
B、They are interested in tornadoes.
C、They all work very hard.
D、They don’t know why tornadoes occur.
答案
D
解析
原文提及“有趣的是,科学家并不清楚龙卷风具体是如何形成的。”故D正确。
转载请注明原文地址:https://tihaiku.com/zcyy/3579351.html
相关试题推荐
[originaltext]WhenpeopletalkaboutAmericanpopularmusic,theydon’tjus
[originaltext]WhenpeopletalkaboutAmericanpopularmusic,theydon’tjus
[originaltext]Thewindsofatornadoarethemostviolentanddestructiveo
[originaltext]W:Areyoubusythisevening?I’mgoingovertotheInternational
[originaltext]W:Areyoubusythisevening?I’mgoingovertotheInternational
[originaltext]W:Areyoubusythisevening?I’mgoingovertotheInternational
[originaltext]W:Hi,Sam.Welcometothe"EllenShow".M:Thankyou.W:Sam,ho
[originaltext]W:Hi,Sam.Welcometothe"EllenShow".M:Thankyou.W:Sam,ho
[originaltext]W:You’vebeentravelingallyourlife.Whenareyougoingtoset
[originaltext]W:You’vebeentravelingallyourlife.Whenareyougoingtoset
随机试题
C
红黏土的形成所必须具备的条件有()。A.地形条件 B.水文条件 C.岩性
资料(一) W集团创立于1988年,是一家从房地产发展起来的企业。20
A市统计局在2014年的工作中取得了较为优异的工作成绩,赵某是该统计局的一名工作
下列关于糖皮质激素所引起的不良反应,错误的是()A.高血压 B.高血
洁净室空气环境使用A.0.2%苯扎溴铵 B.干热灭菌 C.热压灭菌 D.微
各种运输方式内外部的各个方面的构成和联系,就是( )。 A.运输系统
关于城市燃气输配管道的压力表述中,正确的有()。A.高压燃气管道A:0.8
患者水肿延久不退,肿势轻重不一,四肢或全身浮肿,以下肢为主,皮肤瘀斑,腰部刺痛,
1956年苏共二十大召开以后,以毛泽东为核心的党的第一代中央领导集体发表了《论无
最新回复
(
0
)