英语专四阅读理解练习（十一）附答案解析

2015-02-09 10:29:22来源：网络

英语专四阅读理解练习（十一）附答案解析

　　英语专四阅读提分的技巧来源于多做练习，不仅是为了高质快速选择答案正确，更重要的是希望同学们能从阅读理解练习中分析文章的布局安排，作者的意图，换位思考自己在专四写作中会如何运用。希望能对考生们有所帮助。

　　Most earthquakes occur within the upper 15 miles ofthe earth's surface. But earthquakes can and dooccur at all depths to about 460 miles. Their numberdecreases as the depth increases. At about 460miles one earthquake occurs only every few years.Near the surface earthquakes may run as high as100 in a month, but the yearly average does notvary much. In comparison with the total number ofearthquakes each year, the number of disastrousearthquakes is very small.

　　The extent of the disaster in an earthquakedepends on many factors. If you carefully build a toy house with an erect set, it will still standno matter how much you shake the table. But if you build a toy house with a pack of cards, aslight shake of the table will make it fall. An earthquake in Agadir, Morocco, was not strongenough to be recorded on distant instruments, but it completely destroyed the city. Manystronger earthquakes have done comparatively little damage. If a building is well constructedand built on solid ground, it will resist an earthquake. Most deaths in earthquakes have beendue to faulty building construction or poor building sites. A third and very serious factor ispanic. 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. Workingwith local geologists and engineers, the experts have studied the nature of the ground and thetype of most practical building code for the local area. If followed, these suggestions will makedisastrous earthquakes almost a thing of the past.

　　There is one type of earthquake disaster that little can be done about. This is the disastercaused by seismic sea waves, or tsunamis. (These are often called tidal waves, but the name isincorrect. They have nothing to do with tides.) In certain areas, earthquakes take placebeneath the sea. These submarine earthquakes sometimes give rise to seismic sea waves. Thewaves are not noticeable out at sea because of their long wave length. But when they roll intoharbors, 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 systemis in use to warn all shores likely to be reached by the waves. But this only enables people toleave the threatened shores for higher ground. There is no way to stop the oncoming wave.

　　18. 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.

　　19. 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

　　20. The United Nations' experts are supposed to______.?

　　A. construct strong buildings