16.Snow falls in the Earth's extreme North and South throughout the year.However,the heaviest snowfalls have been reported in the mountains of other areas during winter.Snow is even known to fall near the Equator (赤道),but only on the highest mountains.
Snow contains much less water than rain,but much of the water the world uses comes from snow.(36)C In the western United States,mountain snow provides up to seventy-five percent of all surface water supplies.
Snowfall helps to protect plants and some wild animals from winter weather.Fresh snow is made largely of air trapped among the snow crystals (晶体).Because the air has trouble moving,the movement of heat is limited.(37)B The surface of the snow takes in,or absorbs,sound waves.As snow grows older or if there have been strong winds,it can become hard and flat.Then,the snow's surface will help to send back sound waves.
(38)GIt is responsible for the deaths of hundreds of people.Many people die in traffic accidents on roads covered with snow and ice or from being seriously stuck in the winter storm.(39)F.
People may not be able to avoid living in areas where it snows often.However,they can avoid becoming victims of snowstorms.People should stop driving and stay at home until the storm has passed.People living in these areas should carry emergency supplies in their vehicle(车辆).(40)A
A.These include food,emergency medical supplies,and extra clothing to stay warm and dry.
B.Snow also influences the movement of sound waves.
C.Melting(融化了的) snow provides water for rivers,electric power stations and agricultural crops.
D.Mountain snowfall is always heavier than that in the South and the North Poles.
E.In many places,streets were blocked; houses fell down and supplies ere short.
F.Others die from heart attacks caused by too much physical activity out in the cold.
G.Snow may be beautiful,but it can be deadly(致命的).
分析 文章讲述了雪的作用,能帮助动植物过冬,是主要的水的来源,及讲到了如何来避免在暴风雪中成为受害者.
解答 36-40 CBGFA
36.C 上下文语境.根据mountain snow provides up to seventy-five percent of all surface water supplies可知,雪提供75%的水供应,所以前句也用应该提及snow provides water for rivers…,故答案为C.
37.B 上下文语境.从下一句The surface of the snow takes in,or absorbs,sound waves.得知雪表明吸收光波,所以雪对光波的移动也有 影响,故答案为B.
38.G 细节理解题.下一句It is responsible for the deaths of hundreds of people说雪要为上百人的死亡负责人,故推出雪也有时是致命的,故答案为G.
39.F 上下文理解.根据前句Many people die in traffic accidents,有些人死于交通事故,所以下文应该提到其他人的情况,故答案为F.
40.A 细节理解题.根据People living in these areas should carry emergency supplies in their vehicle这句话得知,生活在这些地方的人应该准备紧急补给品,所以下句应该告诉这些补给品是哪些,故答案为A.
点评 本文是一篇选句填空阅读,题目主要考查上下文内容联系以及文章内容理解.做题时学生应仔细阅读原文,把握文章主要内容,联系文章上下文内容并结合所给选项含义,从中选出正确答案,一定要做到有理有据,切忌胡乱猜测.