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
2023-08-14
25
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/2925886.html
相关试题推荐
[originaltext]Let’stalkaboutasocialconditionthatmanypeoplemightbe
[originaltext]Let’stalkaboutasocialconditionthatmanypeoplemightbe
[originaltext]Whatisthedifferencebetweenlovingdisciplineandchildab
[originaltext]Well,mytopictodayisthedoctor-patientrelationship.All
[originaltext]Areyoufortyyearsoldandfat?Doyouwearfineclothes?Do
[originaltext]Areyoufortyyearsoldandfat?Doyouwearfineclothes?Do
[originaltext]Manystudieshavebeenmaderecentlyabouthandpreferencein
[originaltext]Manystudieshavebeenmaderecentlyabouthandpreferencein
[originaltext]M:Hi,Sue.IwaswonderingifyoucouldfillmeinonMonday’sc
[originaltext]M:Hi,Sue.IwaswonderingifyoucouldfillmeinonMonday’sc
随机试题
[originaltext]Wouldyouliketohaveacupofcoffee?[/originaltext][originalt
曲线是女性的象征。具有柔和、优雅的性格。表现出感性、含蓄、丰富、圆润、弹性、韵
西方市场经济国家运用最多的货币政策手段是()。A.公开市场业务 B.贴现率
患者因发热3天,少尿1天诊断为肾病综合征出血热入院,入院当天尿量400ml,给予
模板按照形状可以分为()。A、木模板 B、钢模板 C、平面模板
人就是一棵树。当我们有所失的时候,必须去______,你会发现生命中那些曾以为
下列各项中,能导致一定法律关系产生、变更或消灭的有()。A.人的出生 B.自然
模型与原形采用相同介质,为满足黏性阻力相似,若几何比尺为10,设计模型应使流速比
施工阶段经评估为高风险和极高风险的软弱围岩及不良地质隧道,超前地质预报的责任主体
急性病毒性心肌炎最有效的治疗措施是A.大量静脉点滴维生素C B.用抗病毒药物治
最新回复
(
0
)