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 water-sprouts are rotating funnel cloud air masses of small diameters. They are differentiated by the
Tornadoes, whirlwinds, and water-sprouts are rotating funnel cloud air masses of small diameters. They are differentiated by the
admin
2010-06-30
32
问题
Tornadoes, whirlwinds, and water-sprouts are rotating funnel cloud air masses of small diameters. They are differentiated by the intensities 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. Water-sprouts 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, which of the following behaviors is frequently characteristic of funnel clouds?
选项
A、Descending from different cloud bases.
B、Occurring in isolated areas.
C、Lasting a long time.
D、Occurring in groups.
答案
D
解析
由文中Tornadoes often occur in groups可知应选D。而其它三个选项文中没有提到。
转载请注明原文地址:https://kaotiyun.com/show/EqJd777K
本试题收录于:
公共英语四级笔试题库公共英语(PETS)分类
0
公共英语四级笔试
公共英语(PETS)
相关试题推荐
AccordingtotheAmericanAcademyofDermatology,anestimated10to50millionpeopleinthiscountryhaveanallergicreaction
AccordingtotheAmericanAcademyofDermatology,anestimated10to50millionpeopleinthiscountryhaveanallergicreaction
TherecentsocialandeconomicchangesintheUShavegreatimpactonalltheAmericanhousingsystem.
TherecentsocialandeconomicchangesintheUShavegreatimpactonalltheAmericanhousingsystem.
Couldthebadolddaysofeconomicdeclinebeabouttoreturn?SinceOPECagreedtosupply-cutsinMarch,thepriceofcrudeoil
Couldthebadolddaysofeconomicdeclinebeabouttoreturn?SinceOPECagreedtosupply-cutsinMarch,thepriceofcrudeoil
InJanuary1995,theworldwitnessedtheemergenceofanewinternationaleconomicorderwiththelaunchingoftheWorldTradeO
InAnglo-Americatherearethreemajorethnicgroups.ThefirstistheoriginalIndianpopulation,whotodayrepresentsaminori
Thepassageischieflyabout______.Thedeep-sealisteningsystemmakesuseof______.
Tornadoes,whirlwinds,andwater-sproutsarerotatingfunnelcloudairmassesofsmalldiameters.Theyaredifferentiatedbythe
随机试题
社会经济的变化必然引起道德的变化。
下列哪项可引起呼气性呼吸困难()。
A、玉女煎B、导赤散C、六一散D、黄连解毒汤E、竹叶石膏汤小便短赤,溲时热涩刺痛者,治疗应选用
我国《公司法》规定,以募集方式设立股份有限公司的,发起人认购的股份不得少于公司股份总数的()。
无形财产是一类重要的经济法律关系客体,它可以适用于生产,转化为生产力。但是,()不属于无形财产。
根据《中华人民共和国义务教育法》的规定,为了缩小学校之间办学条件的差距,县级以上人民政府及其教育行政部门应当促进学校()
经过初次分配,国民收入形成的原始收入不包括()。
某人以分期付款的方式买一台电视机,现有两种付款方式:(1)第一个月付800元,以后每个月付200元;(2)前一半时间每个月付400元,后一半时间每个月付100元。两种付款方式的付款总数和时间都相同,请问:该电视机的价格为多少元?
Ascientistwhodoesresearchineconomicpsychologyandwhowantstopredictwayinwhichconsumerswillspendtheirmoneymust
Oneimportantthingduringthepre-Christmasrushatourhousewasthearrivalofmydaughter’skindergartenreportcard.Shego
最新回复
(
0
)