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
2024-10-22
42
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 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 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 can NOT 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
推断题。第一段第一句和第三句指出“地震大多数发生在距地表15英里以内的地方。随着深度的增加地震发生的次数越少。”可知A 、D 符合原文。根据第四句“浅层地震每月可达到100次之多,而平均每年地震的暴发次数变化不大”,可知,B 也符合原文。选项C 过于绝对,故为答案。
转载请注明原文地址:https://tihaiku.com/zcyy/3811844.html
相关试题推荐
Mostearthquakesoccurwithintheupper15milesoftheearth’ssurface.Bu
Thereshouldberoomforprogramsofworldnewswithinchildren’s______.A、rang
EversincehumanbeingshaveinhabitedtheEarth,earthquakeshaveplaguedo
EversincehumanbeingshaveinhabitedtheEarth,earthquakeshaveplaguedo
EversincehumanbeingshaveinhabitedtheEarth,earthquakeshaveplaguedo
EversincehumanbeingshaveinhabitedtheEarth,earthquakeshaveplaguedo
EversincehumanbeingshaveinhabitedtheEarth,earthquakeshaveplaguedo
EversincehumanbeingshaveinhabitedtheEarth,earthquakeshaveplaguedo
EversincehumanbeingshaveinhabitedtheEarth,earthquakeshaveplaguedo
EversincehumanbeingshaveinhabitedtheEarth,earthquakeshaveplaguedo
随机试题
Readthistexttakenfromanarticleabouthowtheaccountantsinfluencethedec
[originaltext]W:Dad,canIgotoamoviewithSharon?M:Yeah,sure,butwait.
以下()工作不适采用评审A.合同签订前期合同审核工作 B.建设单位的用户
在隧道空气相对静压的测定中,通常使用()测定空气相对静压。A.U形压差计
具有燥湿止带、消肿排脓功效的药物是()A.乌贼骨 B.白蔹 C.白
随着社会经济基础的变化,属于意识形态的道德也会发生相应变化。这是道德( )的特征
2013—2020年,全国普通高校毕业生人数同比增速超过4%的年份有几个
关于动脉血CO2分压升高引起的各种效应,下列哪项叙述是错误的?( )A.刺激外
急性弥漫性增生性肾小球肾炎中增生的细胞主要是A.肾小囊壁层上皮 B.肾小囊脏层
党的十九大明确提出,围绕高质量发展,以()主线,推动经济发展质量变革、效
最新回复
(
0
)