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
Most earthquakes occur within the upper 15 miles of the earth’s surface. But earthquakes can and do occur at all depths to about
Most earthquakes occur within the upper 15 miles of the earth’s surface. But earthquakes can and do occur at all depths to about
admin
2014-01-07
38
问题
Most earthquakes occur within the upper 15 miles of the earth’s surface. But earthquakes can and do occur at all depths to about 460 miles. Their number decreases as the depth increases. At about 460 miles one earthquake occurs only every few years. Near the surface earthquakes may run as high as 100 in a month, but the yearly average does not vary much. In comparison with the total number of earthquakes each year, the number of disastrous earthquakes is very small.
The extent of the disaster in an earthquake depends on many factors. If you carefully build a toy house with an Erector set, it will still stand no matter how much you shake the table. But if you build a toy house with a pack of cards, a slight shake of the table will make it fall. An earthquake in Agadir, Morocco, was not strong enough to be recorded on distant instruments, but it completely destroyed the city. Many stronger earthquakes have done comparatively little damage. If a building is well constructed and built on solid ground, it will resist an earthquake. Most deaths in earthquakes have been due to faulty building construction or poor building sites. A third and very serious factor is panic. When people rush out into narrow streets, more deaths will result.
The United Nations has played an important part in reducing the damage done by earthquakes. It has sent a team of experts to all countries known to be affected by earthquakes. Working with local geologists and engineers, the experts have studied the nature of the ground and the type of most practical building code for the local area. If followed, these suggestions will make disastrous earthquakes almost a thing of the past.
There is one type of earthquake disaster that little can be done about. This is the disaster caused by seismic sea waves, or tsunamis.(These are often called tidal waves, but the name is incorrect. They have nothing to do with tides.)In certain areas, earthquakes take place beneath the sea. These submarine earthquakes sometimes give rise to seismic sea waves. The waves are not noticeable out at sea because of their long wave length. But when they roll into harbours, they pile up into walls of water 6 to 60 feet high. The Japanese call them "tsunamis", meaning "harbour waves", because they reach a sizable height only in harbours.
Tsunamis travel fairly slowly, at speeds up to 500 miles an hour. An adequate warning system is in use to warn all shores likely to be reached by the waves. But this only enables people to leave the threatened shores for higher ground. There is no way to stop the oncoming wave.
Which of the following Can Not be concluded from the passage?
选项
A、The number of earthquakes is closely related to depth.
B、Roughly the same number of earthquakes occur each year.
C、Earthquakes are impossible at depths over 460 miles.
D、Earthquakes are most likely to occur near the surfaces.
答案
C
解析
根据第1段的第3句可以排除A;根据第1段的第5句可排除B;根据第1段的第1句可排除D。根据第1段的第2句可确定C的内容不符合文章内容,所以本题选C。
转载请注明原文地址:https://kaotiyun.com/show/qCFK777K
0
专业英语四级
相关试题推荐
InwhatrespectistheUnitedStatesveryfortunate?
Whydoesthemanmentionthatheisanewstudentattheschool?
AsimplepieceofropehangsbetweensomeenvironmentallyfriendlyAmericansandtheirneighbors.Ononesidestandthosewhoha
AsimplepieceofropehangsbetweensomeenvironmentallyfriendlyAmericansandtheirneighbors.Ononesidestandthosewhoha
Womenwhohavediabetesarealmostfourtimesmorelikelytohaveababywithabirthdefect,researchreveals.Oneoutof1
Womenwhohavediabetesarealmostfourtimesmorelikelytohaveababywithabirthdefect,researchreveals.Oneoutof1
Womenwhohavediabetesarealmostfourtimesmorelikelytohaveababywithabirthdefect,researchreveals.Oneoutof1
Whatisthemainsubjectofthedebate?
Atatimewhentheworldisshortofcausesforcelebration,hereisacandidate;withinthenextfewmonthswomenwillcrossth
ImajorinEnglishand______insomeothersubjects.
随机试题
合并用药的基本条件是( )。
与宽松的流动资产投资策略相比,紧缩的流动资产投资策略可能伴随着更高的风险。()
Doinghomeworknotonlycanhelpchildrenmastertheknowledgetheyhavelearned,butaslocantraintheirabilitiesofdoingth
我们要在改造客观世界的过程中改造主观世界,改造主观世界的核心是()。
在一个单CPU的计算机系统中,有两台外部设备R1、R2和三个进程P1、P2、P3。系统采用可剥夺式优先级的进程调度方案,且所有进程可以并行使用I/O设备,三个进程的优先级、使用设备的先后顺序和占用设备时间如下表所示:假设操作系统的开销忽略不计,三个进程
Withoutpropersafeguards,everypartofanetworkisvulnerabletoasecuritybreachorunauthorizedactivityfrom(1),competitor
关系代数是关系操纵语言的一种传统表示方式,它以集合代数为基础,它的运算对象和运算结果均为______。
There______alotofanimalsinthezoo.
WelcometoBookstore.co.ukBookstore.co.ukistheUK’sleadinginternetbookseller.Itisanonlinebookshopwitharangeof
A、Admirethosewhohavesimilarexperience.B、Communicatewithothersratherthanbeisolated.C、Seekacareerappropriatetode
最新回复
(
0
)