2015年00015英语（二）复习资料-真题练习35

单选题
　　1.【阅读选择】The world is not only hungry;it is also thirsty for water. This may seem strange to you,since nearly 75% of the earth‘s surface is covered with water. But about 97% of this huge amount is sea-water,or salt water. Man can only drink and use the other 3%——the fresh water that comes from rivers,lakes,underground,and other sources. And we cannot even use all of that,because some of it is in the form of icebergs（冰山）and glaciers（冰川）.Even worse,some of it has been polluted.
　　What percentage of the earth‘s water can man actually use at present？
　　A.Nearly 75 per cent.
　　B.About 97 per cent.
　　C.Exactly 3 per cent.
　　D.Less than 3 percent.
正确答案：D
　　答案解析：根据本段得知，地球上只有3%的水适于人类饮用，然而部分以冰山或冰川的形式存在，还有的被污染，因而实际上人类能用的水要低于3%。 单选题
　　1.【阅读选择】We are so used to our life on the surface of the earth that it can be quite an effort for our mind to break free of all the ideas that we take for granted. Because we can feel that things are heavy,we think of "weight"as being a fixed quality in an object,but it is not really fixed at all. If you could take a one-pound packet of butter 4,000 miles out from the earth,it would weigh only a quarter of a pound.
　　How much would four pounds of tea weigh if it was taken 4,000 miles out from the surface of the earth？
　　A.1 pound.
　　B.2 pounds.
　　C.3 pounds.
　　D.4 pounds.
正确答案：A
　　答案解析：本题问的是一磅茶如果被带出离地球表面4000英里的地方，重量会是多少？4000这个数字比较关键，因为在本段最后一句中出现了这个词，一看该句If you could take a one-pound packet of butter 4,000 miles out from the earth， it would weigh only a quarter of a pound.只是把名词换了一下，很显然答案就是变成原来重量的四分之一，因此正确答案是A。