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大學(xué)英語(yǔ)專(zhuān)四閱讀備考訓(xùn)練試題附答案解析
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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 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 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.?
1. Which of the following CANNOT be concluded from the passage??
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.?
2. The destruction of Agadir is an example of
A. faulty building construction?
B. an earthquake’s strength?
C. widespread panic in earthquakes?
D. ineffective instruments?
3. The United Nations’ experts are supposed to_______
A. construct strong buildings?
B. put forward proposals
C. detect disastrous earthquakes?
D. monitor earthquakes?
4. The significance of the slow speed of tsunamis is that people may
A. notice them out at sea?
B. find ways to stop them?
C. be warned early enough?
D. develop warning systems
答案解析
1. C)可用排除法來(lái)找出此題的答案。題干要求找出無(wú)法從文章中得出結(jié)論的一項(xiàng)。根據(jù)文章第一段第一句到第三句可知“隨著深度的增加，地震的數(shù)量隨之減少”，可得出結(jié)論選項(xiàng)A“地震的數(shù)量和深度密切相關(guān)”，故排除。根據(jù)文章第一段第五行“…
in a month, but the yearly average does not vary much.”(接近地表處地震的發(fā)生頻率可高達(dá)每月一百多次，但是年平均地震數(shù)量卻變化不大。)可排除選項(xiàng)B. Roughly the same number of earthquakes occur each year.(每年發(fā)生的地震數(shù)量大致相同);根據(jù)文章第一段可得出以下結(jié)論：地震主要發(fā)生在離地表十五公里的范圍之內(nèi)，盡管深達(dá)460公里的深處也有地震發(fā)生，但是每隔幾年才發(fā)生一次。故可排除選項(xiàng)D Earthquakes are most likely to occur near the surfaces.(地震主要發(fā)生在地表處)。綜上可知，選項(xiàng) C 為正確答案。?
2. A)文章第二段首先舉例說(shuō)明運(yùn)用不同的建筑方法和材料所修建的房屋的抗震能力是不同的，進(jìn)而就提到了發(fā)生在摩洛哥Agadir的地震雖然震級(jí)不大，卻摧毀了整個(gè)城市，而許多更強(qiáng)烈的地震所造成的損失卻很小，由此作者得出結(jié)論：如果建筑物修建得好并且建在堅(jiān)固的地面上，那么它就能抵御地震;地震中大多數(shù)的死亡是由于不良的建筑結(jié)構(gòu)或不當(dāng)?shù)慕ㄖ攸c(diǎn)造成的。由此可知作者引用摩洛哥的Agadir的毀滅主要是要說(shuō)明不良的'建筑結(jié)構(gòu)(faulty building construction)，故選項(xiàng)A為正確答案。?
3. B)根據(jù)文章第三段可知，聯(lián)合國(guó)在地震減災(zāi)方面起到了非常重要的作用，它派出了許多地震專(zhuān)家到飽受地震襲擾的國(guó)家，與當(dāng)?shù)氐牡刭|(zhì)學(xué)家和工程師一起研究當(dāng)?shù)氐牡刭|(zhì)構(gòu)造及適合當(dāng)?shù)氐膶?shí)用的建筑法規(guī)，并且如果這些專(zhuān)家提出的建議得到采納，災(zāi)難性的地震就會(huì)成為歷史。因此這四個(gè)選項(xiàng)中，最合適的是B put forwardproposals “提出建議”，故其為正確答案。?
4. C)根據(jù)文章最后一段，海嘯的移動(dòng)速度緩慢，使人們得以及早發(fā)現(xiàn)，以提前向沿岸的居民發(fā)出警告，離開(kāi)海邊到高地去，但是人們卻無(wú)法阻止到來(lái)的巨浪。故選項(xiàng)C be warned early enough為正確答案。
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