首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
外语
Tornadoes, whirlwinds, and watersprouts are rotating funnel cloud air masses of small diameter. They are differentiated by the i
Tornadoes, whirlwinds, and watersprouts are rotating funnel cloud air masses of small diameter. They are differentiated by the i
admin
2010-01-26
50
问题
Tornadoes, whirlwinds, and watersprouts are rotating funnel cloud air masses of small diameter. They are differentiated by the intensity of their rotation and by the surfaces that they traverse. Though tornadoes and whirlwinds both travel over land masses, whirlwinds are atmospheric systems smaller than tornadoes. Watersprouts are tornadoes that form or pass over a water surface. A tornado is a powerful vortex or "twister" whose rotational speeds are estimated to be near 300 miles per hour. The first visible indication of tornado development is usually a funnel cloud. As this funnel dips earthward, it becomes darker because of the debris that is forced into its intensifying vortex. Some tornadoes give no visible warning Until their destruction strikes the unsuspecting victim. Tornadoes often occur in groups, and several twisters sometimes descend from the same cloud base. The forward speed of a tornado is normally 30 to 40 miles per hour. In the short time that it takes to pass, a tornado can cause fantastic destruction. There have been cases reported in which blades of straw were embeded in fence posts.
According to the passage, some tornadoes take people unaware because they ______.
选项
A、produce a sound similar to thunder
B、cannot be seen until it is too late
C、look so much like other clouds
D、carry so many large pieces of debris
答案
B
解析
这道题考生注意到文中"Some tornadoes give no visible warning until their distraction strikes the unsuspecting victim.”“no visible”也就是“cannot be seen.”所以应选B。
转载请注明原文地址:https://kaotiyun.com/show/afdK777K
0
大学英语六级
相关试题推荐
Sustainabledevelopmentisappliedtojustabouteverythingfromenergytocleanwaterandeconomicgrowth,andasaresultith
Today,mostcountriesintheworldhavecanals.Somecanals,suchastheSuezorthePanama,【B1】shipsweeksoftimebymakingth
A、Husbandandwife.B、Bossandsecretary.C、Interviewerandinterviewee.D、Fatheranddaughter.CWhatistherelationshipbetwee
Whatisthemainpurposeofthepassage?Accordingtothepassage,whohasthegreatestdegreeofcontrolinanadministeredsy
Whatdoesthepassagemainlydiscuss?Thegrowthofthepopulationcausedthechangeofits______Massivewavesofimmigration
A、Cousins.B、Auntandnephew.C、Nieceanduncle.D、Aclientandasecretary.AW:IsAuntMargaretin?Ihavegotsomethingimpor
A、Heusedtosharehishouseopenlywiththestrangestcreatures.B、Guestswhocametodinnerhadtobepreparedforamostunus
A、Thegamehasbeencanceled.B、Theirteamplayedverybadly.C、Footballisherfavoritepastime.D、She’sneverwatchedabetter
A、TansPueblo.B、Apache.C、Navajo.D、Ute.AWhichtribedothepeopleattheIndianmarketnotrepresent?信息明示题。男士说市场上的大多数人都是印第安人
Manyofthemostdamagingandlifethreateningtypesofweathertorrentialrains,severethunderstorms,andtornadoesbeginquic
随机试题
请简单介绍20世纪30年代报告文学的兴盛。
可撤销合同自人民法院决定撤销之日起没有法律效力。()
根据承租人的授权和指示,代表承租人利益在租船市场上为承租人洽租合适船舶的人称为()
定期考核不合格的医师暂停执业活动期满,再次考核仍不合格的
根据合同法律制度的规定,由于债权人的原因,债务人无法向债权人交付合同标的物时,可以将该标的物交给提存部门,从而消灭债务,在标的物提存后,标的物毁损、灭失风险责任的承担者是()。
(2009年)两个平行的无限大灰体表面1和表面2,温度分别为T1和T2,发射率均为0.8。若在中间平行插入一块极薄的、发射率为0.4的金属板,则表面1和表面2之间换热量变为原来的()。
下列选项中不正确的是()。
某单位出纳员张某6月10日经办了三项业务:①收到单位从外地购物的发票,发现发票金额为30000元,实际支付金额为25000元,两者不一致,便在发票上做了更改,并加盖了自己的印章,作为报销凭证。②销售给外单位的商品发生退回,经单位领导批准,同意退款1
《中华人民共和国对外贸易法》的基本原则是什么?
Theprizesinthegames______ofmedalsanddiplomas.
最新回复
(
0
)