阅读理解 C

单选题 Which of the following is a typical symptom of the bends?

A、 A twisted body.
B、 A gradual decrease in blood supply.
C、 A sudden release of nitrogen in blood.
D、 A drop in blood pressure.

【正确答案】 A

【答案解析】【解析】根据文章第一段提到if the bubbles (气泡) accumulate in a joint, is sharp pain and a bent body—thus the name.由此可知，扭曲身体是屈肢症的典型症状之一，故选A。

单选题 The purpose of Rothschild’s study is to see________ .

A、 how often ichthyosaurs caught the bends
B、 how ichthyosaurs adapted to decompression
C、 why ichthyosaurs bent their bodies
D、 when ichthyosaurs broke their bones

【正确答案】 B

【答案解析】【解析】文章第三段提到What he particularly wanted to investigate was how ichthyosaurs adapted to the problem of decompression over the 150 million years.由此可知，Bruce Rothschild研究的目的在于弄清楚鱼龙是怎样来适应减压问题的。故选B。

单选题 Rothschild’sfindingstatedinParagraph4 .

A、 confirmed his assumption
B、 speeded up hisresearch process
C、 disagreed with his assumption
D、 changed his research objectives

【正确答案】 C

【答案解析】【解析】文章第四段提到When he started, he assumed that signs of the bends would be rarer in younger fossils, reflecting their gradual evolution of measures to deal with decompression. Instead, he was astonished to discover the opposite. 由此可知，他的发现与他最初的设想并不一致。故选C.

单选题 Rothschild might have concluded that ichthyosaurs.

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

【正确答案】 A

【答案解析】【解析】文章第五段提到If ichthyosaurs did evolve an anti-decompression means, they clearly did so quickly—and, most strangely, they lost it afterwards.由此可知，鱼龙没有进化成减压的方式，A与文章相符。