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
2023-11-13
30
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 significance of the slow speed of tsunamis is that people may ______.
选项
A、notice them out at sea
B、find ways to stop them
C、be warned early enough
D、develop warning systems
答案
C
解析
最后一段 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的话可以得到问题的答案。
转载请注明原文地址:https://tihaiku.com/zcyy/3182717.html
相关试题推荐
Thereshouldberoomforprogramsofworldnewswithinchildren’s______.A、rang
Sucheuphemismsmaybestylistically"permissible"iftheyarekeptwithin_____
Mostearthquakesoccurwithintheupper15milesoftheearth’ssurface.But
Mostearthquakesoccurwithintheupper15milesoftheearth’ssurface.But
Mostearthquakesoccurwithintheupper15milesoftheearth’ssurface.But
Mostearthquakesoccurwithintheupper15milesoftheearth’ssurface.But
Mostearthquakesoccurwithintheupper15milesoftheearth’ssurface.But
Mostearthquakesoccurwithintheupper15milesoftheearth’ssurface.But
Mostearthquakesoccurwithintheupper15milesoftheearth’ssurface.But
Mostearthquakesoccurwithintheupper15milesoftheearth’ssurface.But
随机试题
Happinessusedtohaveamuchbroadermeaning-tiedtotheideaofa_____andmean
SpeakerA:Thankyouforyourtimeandefforttomakemyvisitasuccess.Speake
A
促使从众行为产生的原因包括?()A.与大家保持一致以实现团体目标 B.为
能够反映企业或项目各年所面临的财务风险程度及偿债能力的长期偿债能力指标是( )。
蛋白质变性和DNA变性的共同点是 A.变性后原生物学活性丧失B.原空间结构破坏
把下面的六个图形分成两类,使每一类图形都有各自的共同特征或规律,分类正确的一项是
关于“强迫观念”与“强制思维”的临床意义,下列表述中正确的是()。 (
女,64岁,戴全口义齿一天,左侧后牙反复咬颊。查:全口义齿固位好,左侧后牙接触良
(2021年真题)施工中出现需要加固的质量缺陷时,项目监理机构应审查施工单位提交
最新回复
(
0
)