分析 本文是说明文.主要讲述人类有一个一直感兴趣但一直未能实现的愿望:水上行走.不能实现的原因是"生物性局限".本文主要介绍了一种理论上可行实际上难以实现的人类水上行走的方法:借助玉米粉(corn flour)增加水面浓度.
解答 44.B 考查细节理解.从第一段"Sadly,biological facts prevent us ever accomplishing such a thing without artificial aid …"可知,人类至今不能在水面行走是"生物"原因.故选择B.
45.C 考查细节理解.从第二段"It can run across water for a distance of several meters,avoiding getting wet by rapidly hitting the water's surface with its feet."可知,这种蜥蜴能在水面行走是因为速度快(每秒钟达到20步).故选择 C.
46.A 考查细节理解.第三段"this common thickening agent"明确这是一种"常见的增稠剂".故选择A.
47.D 考查态度判断题.从第二段"it does take a lot"及最后一段"it's still rather messy and better read about in theory than carried out in practice."等句推断,借助增稠剂实现人类在水面行走,理论上可行但真正实现很难做到.故选择D项.
点评 解答细节理解题时,一个常用的方法就是运用定位法,即根据题干和选项中的关键词从原文中找到相关的句子,与选项进行比较从而确定答案;推理判断题既要求学生透过文章表面文字信息推测文章隐含意思,又要求学生对作者的态度、意图及文章细节的发展作正确的推理判断,力求从作者的角度去考虑,不要固守自己的看法或观点.
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32.A.actually | B.hardly | C.nearly | D.formerly |
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