分析 本文属于说明文阅读,作者通过这篇文章主要向我们描述了大象有非凡的辨别敌人的能力,他们能依靠声音辨别出自己的敌人,对于无害的声音则不会逃离.
解答 47.B.主旨大意题.根据文章第一段"The giants have shown a remarkable ability to use sight and smell to distinguish between African racial groups that have a history of attacking them and groups that do not"可知文章主要讲了大象有非凡的辨别敌人的能力;故选B.
48.C.推理判断题.根据文章第二段"To find out whether this was true,they recorded the voices of men from two Kenyan racial groups calmly saying"可知生物学家记录马赛的声音和坎巴是为了找出大象是否能认出敌人的声音;故选C.
49.A.细节理解题.根据文章最后一段"To find out,they recorded Maasai women and boys saying the same phrase,and monitored elephant-family responses to them.They found that the differences were similar to what they saw with the Kamba"可知生物学家是通过比较得出这项研究的最终结论的;故选A.
50.D.推理判断题.根据文章最后一段"To find out,they recorded Maasai women and boys saying the same phrase,and monitored elephant-family responses to them.They found that the differences were similar to what they saw with the Kamba"可知这篇文章之后会提到大象不可能逃离马赛族妇女和孩子的声音;故选D.
点评 考察学生的细节理解和推理判断能力,做细节理解题时一定要找到文章中的原句,和题干进行比较,再做出正确的选择.在做推理判断题不要以个人的主观想象代替文章的事实,要根据文章事实进行合乎逻辑的推理判断.
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