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2017英语专四阅读理解练习（二十四）

2016-09-21 15:02:36来源：网络

2017英语专四阅读理解练习（二十四）

　　On January 10,1962, anenormous piece of glacier broke away and tumbled down the side of a mountain in Peru. A mereseven minutes later, when cascading ice finally came to a stop ten miles down the mountain; it hadtaken the lives of 4,000 people.

　　This disaster is one of the most “devastating”examples of a very common event: an avalanche ofsnow or ice. Because it is extremely cold at very high altitudes, snow rarely melts. It just keepspiling up higher and higher. Glaciers are eventually created when the weight of the snow is so greatthat the lower layers are pressed into solid ice. But most avalanches occur long before thishappens. As snow accumulates on a steep slope, it reaches a critical point at which the slightestvibration will send it sliding into the valley below.

　　Even an avalanche of light power can be dangerous, but the Peruvian catastrophe was particularlyterrible because it was caused by a heavy layer of ice. It is estimated that the ice that broke offweighed three million tons. As it crashed down the steep mountainside like a gigantic snow plough,it swept up trees, boulders and tons of topsoil, and completely crushed and destroyed the sixvillages that lay in its path.

　　At present there is no way to predict or avoid such enormous avalanches, but, luckily, they arevery rare. Scientists are constantly studying the smaller, more common avalanches, to try tounderstand what causes them. In the future, perhaps dangerous masses of snow and ice can befound and removed before they take human lives.

　　1. The first paragraph catches the reader's attention with a _____.

　　A. First hand report

　　B. dramatic description

　　C. tall tale

　　D. vivid world picture

　　2. In this passage "devastating" means ______.

　　A. violently ruinous

　　B. spectacularly interesting

　　C. stunning

　　D. unpleasant

　　3. The passage is mostly about ______.

　　A. avalanches

　　B. glaciers

　　C. Peru

　　D. Mountains

　　参考答案：1.C 2.D 3.A



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