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
2012-01-21
36
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 erect 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 harbors, they pile up into walls of water 6 to 60 feet high. The Japanese call them "tsunamis", meaning "harbor waves", because they reach a sizable height only in harbors. 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.
The United Nations’ experts are supposed to ______.
选项
A、construct strong buildings
B、put forward proposals
C、detect disastrous earthquakes
D、monitor earthquakes
答案
B
解析
文章第三段主要讲述experts的作用。“The experts have studied the nature of the ground and the type of most practical building code for the local area.”并且提出suggestions。
转载请注明原文地址:https://kaotiyun.com/show/qFXd777K
本试题收录于:
公共英语五级笔试题库公共英语(PETS)分类
0
公共英语五级笔试
公共英语(PETS)
相关试题推荐
WhySoManyChildren?InmanyofthedevelopingcountriesinAfricaandAsia,thepopulationisgrowingfast.Thereasonfor
OnceDailyPillCouldSimplifyHIVTreatmentBristol-MyersSquibbandGileadScienceshavecombinedmanyHIVdrugsintoasi
Obesity(肥胖)CausesGlobalWarmingThelistofillsattributabletoobesitykeepsgrowing:Lastweek,obesepeoplewereaccuse
Obesity(肥胖)CausesGlobalWarmingThelistofillsattributabletoobesitykeepsgrowing:Lastweek,obesepeoplewereaccuse
ManofFewWordsEveryonechasessuccess,butnotallofuswanttobefamous.SouthAfricanwriterJohnMaxwellCoetzee
ThecompanyissuesanannualreporteveryMarch.
FederalDepositInsuranceCorporationBefore1933,andparticularlyduringtheperiod1929—1933,bankfailureswerenotuncom
Now,inthispartofthetestI’mgoingtogiveeachofyoualistofthreedifferenttopics.Idlikeyoutoselectoneofthet
Guamisdescribedas______Bywhichofthefollowingnumbercanonegetfurtherinformation?
______wasopenedtomepublicasearlyasl978?______ownsthreecoffinswithinit?
随机试题
人体的消化腺是________。
下面有关老年人用药注意事项的说法错误的是( )。
病人,女性,45岁,卵巢囊肿,新人院。护士收集资料时,询问“您是否绝经了?”这一提问属于
以下,()不属于设备安装工程费用的构成部分。
投资风险它也是一种经营风险,通常指企业投资的______。
全程陪同导游人员是指受()委派,作为其代表,在领队和地方陪同导游人员的配合下实施接待计划,为旅游团(者)提供全程陪同服务的工作人员。
通货膨胀目标制
在某项测验中,总分高分组被试在某题的通过率为0.70,低分组被试在该题的通过率为0.20,那么该题的区分度为
模块包含了一个声明区域和一个或多个子过程(Sub开头)或函数过程(以【】开头)。
What’stheproblem?
最新回复
(
0
)