2013 Jiangsu Question 64 Single-choice Differentiating
64．Rothschild might have concluded that ichthyosaurs A
A. failed to evolve an anti decompression means
B. gradually developed measures against the bends
C. died out because of large sharks and crocodiles
D. evolved an anti decompression means but soon lost it
【考点】OA：健康环保类阅读
【分析】本文属于科普说明文，主要向我们讲述了鱼龙的身体弯曲的原因以及结果
罗斯柴尔德博士通过实验推翻了以前关于鱼龙进化的一些猜测
【解答】61．A 细节理解题．根据第一段If a diver surfaces too quickly，he may suffer the bends．Nitrogen（氮） dissolved（溶解） in his blood is suddenly liberated by the reduction of pressure．可知潜水员如果露出水面太快身体会弯曲，故选A
> 62．B 推理判断题．根据第三段to find out how widespread the problem was in the past和to investigate was how ichthyosaurs adapted to the problem of decompression可知罗斯柴尔德博士的研究目的是为了探讨鱼龙如何适应减压的问题，故 选B
> 63．C 推理判断题．根据第四段he assumed that signs of the bends would be rarer in younger fossils，接下来又说Instead，he was astonished to discover the opposite．可知，他开始时所认为的与实验得出的结论不符，因此说他的实验结果和他 开始的预测相反，故选C
Answer key
A