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
2013-06-03
67
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 m 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
第三段可以提供该题目答案,即,请求联合国专家提出意见。
转载请注明原文地址:https://kaotiyun.com/show/WwQK777K
0
专业英语四级
相关试题推荐
Togiveyouageneralideaofourproducts,weenclosethecataloguesshowingvariousproductshandledbyuswithdetailedandm
Itwasrecentlyreportedinanewspaperthatmanycollegestudentswereeagertogoafterbrandproductsandwereunabletomake
Inthepasttwodecades,mainlandChina’sartmarkethasfollowedthesameflightpathastherestofthecountry’srocketingec
Itwasunusualforthere______sofewstudentsintheclassroom.
TheUNcommissionofinquiryonEastTimorhasfoundevidencethat______.
TheUNcommissionofinquiryonEastTimorhasfoundevidencethat______.
Cellscannotremainaliveoutsidecertainlimitsoftemperature,andmuchnarrowerlimitsmarktheboundariesofeffectivefunct
Althoughherefusedtoactonmysuggestion,hehadtoadmitthat______whatIsaid.
Optimismisa______showntobeassociatedwithgoodphysicalhealth,lessdepressionandlongerlife.
Wheninvitedtotalkabouthisachievements,herefusedtoblowhisown______anddeclinedtospeakatthemeeting.(2008年考试真题)
随机试题
何谓单元体育教学计划?单元教学结束的时候如何对学生的学习效果进行评价?
我国社会主义初级阶段是指()
A.肺肉质变B.壁层胸膜斑C.蜂窝肺D.早期肺门淋巴结病变矽肺可出现
四肢长骨摄片时至少应包括( )
公文的收发要履行的处理程序包括登记、分办、拟办和()。
ThepassengersonthebuswatchedwithsympathyasSusanmadeherwaycarefullyupthesteps.Shepaidthedriverandthen,usin
(2014年第34题)结合材料回答问题:巧用大循环,处理不再难山东某地采用循环经济的理念,将秸秆“吃干榨尽”,对秸秆利用进行了有益探索。一、秸秆种蘑菇该地小麦种植面积为6
在客户机/服务器模型中,响应并发请求有不同的解决方案,这些方案包括()。
A、 B、 C、 B[A]是winter,[B]是rain,[C]是summer。
A、Itisquitegeneral.B、Mostoftheinformationheneedswillbefoundinnewspapers.C、Shethinksheshouldchangeit.D、Itsh
最新回复
(
0
)