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  3. The extinction of large prehistoric animals is noted to suggest that ______. We can infer from Dr. Myers and Dr. Worm’s paper t

The extinction of large prehistoric animals is noted to suggest that ______. We can infer from Dr. Myers and Dr. Worm’s paper t

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问题 The extinction of large prehistoric animals is noted to suggest that ______.
We can infer from Dr. Myers and Dr. Worm’s paper that ______.
选项 A、the stock of large predators in some old fisheries has reduced by 90%
B、there are only half as many fisheries as there were 15 years ago
C、the catch sizes in new fisheries are only 20% of the original amount
D、the number of larger predators dropped faster in new fisheries than in the old
答案A
解析 这是一个推理题，也可以说是细节题。这道题目关键是要理解原文第二段的最后一句：...the biomass of large predators(animals that kill and eat other animals)in a new fishery is reduced on average by 80% within 15 years of the start of exploitation．In some long-fished areas，it halved again since then．前一个句子讲大型食肉动物减少了80%，即剩下20%，后句讲现在在某些long fished地区，又减少了一半即10%，所以总共减少了90%。
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