分析 文章大意:本文主要讲述了河流对于人类生活的重要性,如可以进行运输,灌溉,饮用等.然而随着城市的发展和工业产业数量的增加,河流中的水会被化学物品和其它物质污染.人们应该知道河流的重要性,如果想要享受自然资源就应该多做一些保护河流清洁的事情.
解答 42.答案:A.细节理解题.根据短文第二段The greatest of all for navigation (航海),however,is the Amazon in Brazil.描述,可知世界上最好的用来航行的河流是亚马逊河.故选A.
43.答案:D.细节理解题.根据短文倒数第二段In order to increase(增加) the supply of crops,engineers sometimes build a dam (大坝) across a river and let a lake from behind the dam.Then people can use the water not only to irrigate (灌溉) their fields but also to make electricity for their homes and industries.描述,可知在河流中建好大坝后,人们不仅可以用河水来灌溉,还可以利用河水来发电.故选D.
44.答案:C.细节理解题.根据As the cities grow in size and industries increase in number,the water in the rivers becomes polluted with chemicals(化学物质) and other materials.描述,可知河水由于化学物质和其它东西受到了污染.故选C.
45.答案:B.标题归纳题.阅读短文可知本文主要讲述了河流对于人类生活的重要性,以及河流受到污染的事实.故选B,河流的重要性.
点评 阅读题型,要注重句子与句子之间、段落与段落之间逻辑关系以及对篇章的整体理解.根据所给问题选择正确选项完成试题.
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