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
5
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://www.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
SydneyOperaHousemustbeoneofthemostrecognizableimagesofthemodern
Theimagewasfascinating,asjusticeJohnPaulStevens,aChicagonative,
被称为“活校”的是( )。A.校异同 B.校是非 C.人工校对 D.计算
高处作业吊篮检查评分表中保证项目是()。A.交底与验收 B.安全装置 C
信用风险是指由于人为错误、技术缺陷或不利的外部事件所造损失的风险。()
从所给四个选项中,选择最合适的一个填人问号处,使之呈现一定的规律性。
A.急性胃肠炎 B.溃疡性结肠炎 C.胃溃疡 D.肝性脑病 E.上消化道
A这里φ(u)是已给定的函数,但因无具体表达式,所以无论在怎样的坐标系下,无论是先对哪个变量积分都无法进行计算,根据本题积分区域关于直线y=x对称及被积函数的形
共用题干 某商品住宅小区公有住宅800套,已售出并交付600套,其中三套住房登
关于政府间转移支付制度理论依据的说法,错误的是()。A:纠正政府间的纵向财政失衡
最新回复
(
0
)