首页
登录
职称英语
Most earthquakes occur within the upper 15 miles of the earth’s surface. But
Most earthquakes occur within the upper 15 miles of the earth’s surface. But
游客
2024-09-16
56
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 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. Another 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] Which of the following CANNOT 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
推理判断题。选项A,B和D的内容均可在第一段中找到。只有选项C无法从文中得出,故答案为C。
转载请注明原文地址:http://tihaiku.com/zcyy/3760350.html
相关试题推荐
Afast-foodrestaurantwithinabout500feetofaschoolmayleadtoatleas
Afast-foodrestaurantwithinabout500feetofaschoolmayleadtoatleas
Afast-foodrestaurantwithinabout500feetofaschoolmayleadtoatleas
Thecompanystipulatedthatthiscontract______fulfilledwithinonemonth.A、isB
Steam______intowaterwhenittouchesacoldsurface.A、shrinksB、contractsC、con
Mostearthquakesoccurwithintheupper15milesoftheearth’ssurface.But
Readingefficiencymeansthe______ofareadingtaskwithinanappropriatetimef
Mostearthquakesoccurwithintheupper15milesoftheearth’ssurface.But
Mostearthquakesoccurwithintheupper15milesoftheearth’ssurface.But
Mostearthquakesoccurwithintheupper15milesoftheearth’ssurface.But
随机试题
[originaltext]W:NowI’vegotyourbackground,let’stalkaboutthemanagement
甲、乙公司已进入稳定增长状态,股票信息如下: 下列关于甲、乙股票投资的说法
下列不属于医德评价的客观标准是:A.有利于提高医务工作的经济效益 B.有利于人
(2011年)县级国库库款的支配权属于( )A.县级人民代表大会 B.县级人民
下面放样方法中,不属于平面位置放样方法的是()A.直角坐标法 B.高程上
A.副主任药师和主任药师 B.药师以上专业技术人员 C.执业药师 D.药士
A. B. C. D.
一住店客人未付房钱即想离开旅馆去车站。旅馆服务员揪住他不让走,并打报警电话。客人
下列关于项目资本金制度说法正确的是()。A.是促进有效投资的重要手段 B
某施工企业向银行借款100万元,年利率8%,半年复利计息一次,第三年末还本付息,
最新回复
(
0
)