首页
登录
职称英语
Most earthquakes occur within the upper 15 miles of the earth’s surface. Bu
Most earthquakes occur within the upper 15 miles of the earth’s surface. Bu
游客
2024-10-11
41
管理
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. [br] The destruction of Agadir is an example of______.
选项
A、faulty building construction
B、an earthquake’s strength
C、widespread panic in earthquakes
D、ineffective instruments
答案
A
解析
第二段中的例子可以分析得出,faulty building construction 是引发Agadir 毁灭的原因。
转载请注明原文地址:https://tihaiku.com/zcyy/3797279.html
相关试题推荐
Mostearthquakesoccurwithintheupper15milesoftheearth’ssurface.Bu
Withinthatexclusivegroupofliterarycharacterswhohavesurvivedthrough
Withinthatexclusivegroupofliterarycharacterswhohavesurvivedthrough
Withinthatexclusivegroupofliterarycharacterswhohavesurvivedthrough
Withinthatexclusivegroupofliterarycharacterswhohavesurvivedthrough
Mysisterisquite______andplanstogetanM.A.degreewithinoneyear.A、aggre
Eachyear,moreUSpropertieswithinfloodplainsaredestroyedbyfloodingt
Eachyear,moreUSpropertieswithinfloodplainsaredestroyedbyfloodingt
Eachyear,moreUSpropertieswithinfloodplainsaredestroyedbyfloodingt
Evenfromwithinprison,hisqualitiesofleadership______hisfollowers.A、aspire
随机试题
Despitethemonthlylovers’quarrels,wealwaysmanageto______.A、adjustB、reco
[originaltext]W:Hello.CanItakeyourorder?M:Yes.I’dlikealargepeppero
教师在经验学习的认同阶段所承担的角色是______。
B
下列关于供给弹性的说法中,正确的有( )。 Ⅰ.供给价格弹性是指供给量相对价
关于基金信息披露的作用,以下表述错误的是( )。A.有利于基金份额持有人对基金
下列哪个方剂的组成不包含生姜A.真武汤B.四神汤C.定喘汤D.当归四逆汤E.橘皮
截至2015年底,中国创业投资各类机构数已达1775家,同比增长14.4%。其中
在其他条件不变的情况下,下列关于软土地基固结系数的说法中正确的是哪些选项?(
学生心理发展的基本特征是:连续性与{pz_填空}、定向性与顺序性、不平衡性与差异
最新回复
(
0
)