分析 本文是一篇科教类阅读,属于议论文,数百万年前,地球上有许多类型的恐龙.大多数恐龙是植物食者,一些是肉食者.本文以此展开谈论,主要谈论了恐龙消失的原因.
解答 28.A.词义猜测题.根据全文内容,尤其是Dinosaurs were real animals that once lived on the earth,but they died out about 65million years ago.可知,Dinosaurs指的是曾经存在过的动物.故可推测出Dinosaurs意为恐龙.故选A.
29.C.细节理解题.根据文章内容,尤其是The disappearance of the dinosaurs is in some way a puzzle.以及下文探讨气候,食物等可知,本文主要就恐龙消失的原因做了讨论.故选C.
30.B.细节理解题. 根据Some scientists think that the climate changed suddenly.以及A new idea is that a meteor crashed into the earth.可知,本文主要讲述了气候巨变和流星撞击两个原因.故选B.
31.D.细节理解题.根据But,as many animals from that time didn't die,we are not sure what really happened.以及The disappearance of the dinosaurs is in some way a puzzle.可知,恐龙消失的原因至今还是个谜.故选D.
点评 本文是一篇科教类阅读,题目涉及多道细节理解题,词义猜测题.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.
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