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
2024-04-12
6
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.
9 What does the speaker say about the scientists?
10 In what way does a narrow zone of storm clouds develop?
11 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/3552156.html
相关试题推荐
[originaltext]M:Comein,Rose.Coffee?W:Thankyou,Jack.M:Howaboutthevi
[originaltext]M:IjustwonderwhyJanetneverbecomesanactressintheadvert
[originaltext]M:IjustwonderwhyJanetneverbecomesanactressintheadvert
[originaltext]M:IjustwonderwhyJanetneverbecomesanactressintheadvert
[originaltext]ThefirsttimeArnoldSchwarzeneggerwenttotheUnitedState
[originaltext]ThefirsttimeArnoldSchwarzeneggerwenttotheUnitedState
[originaltext]ThefirsttimeArnoldSchwarzeneggerwenttotheUnitedState
[originaltext]ClimbingtheGreatWallmusthavebeenthirstywork.Itwasl
[originaltext]ClimbingtheGreatWallmusthavebeenthirstywork.Itwasl
[originaltext]M:Hello,Nancy.Iknowyouareoneofthewomentaxidriversin
随机试题
Onceuponatimeapoorfarmertakingasackofwheattothemilldidnotkn
TheReal-nameTrainTicketSystemLaunched1.有些地方开始实行火车票实名制,目的是…2.也会带来问题3.你的看法
女,5岁。发现皮肤出血点2天来院。病前10天有上呼吸道感染史,平素体建。查体:一
根据《城镇职工基本医疗保险用药范围管理暂行办法》临床治疗必需,使用广泛,疗效好,
称为“水谷之悍气”的是A.元气B.宗气C.脾气D.卫气E.营气
关于小儿生长发育顺序的规律,下列哪项正确A.先下后上 B.由远到近 C.由细
编制工程建设项目施工招标文件时,下列确定评标基准价的方法符合相关规定的是( )
从表面上看,贷款分类就是把贷款按照()划分为不同档次。A.贷款内容 B.贷
下列属于中国银监会的具体监管目标的有()。A:努力减少银行业金融犯罪,维护金融稳
(2016年真题)赵某、钱某、孙某各出资5万元开办一家经营餐饮的甲普通合伙企业(
最新回复
(
0
)