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GWD6-Q11

However, although polar bears’ locomotion is similarly inefficient, polar bear cubs walk along with their mother.  
Furthermore, the daily movements of sloth bears and American black bears which are similar in size to sloth bears and have similar-sized home ranges reveal similar travel rates and distances, suggesting that if black bear cubs are able to  keep up with their mother, so too should sloth bear cubs.
GWD6-Q11:
Which of the following, if true, would most weaken the author’s argument in lines 18-26 (“Furthermore … sloth bear cubs”)?
A.    Cub-carrying behavior has been observed in many non-myrmecophagous mammals.
B.    Many of the largest myrmecophagous mammals do not typically exhibit cub-carrying behavior.
C.    Some sloth bears have home ranges that are smaller in size than the average home ranges of black bears.
D.    The locomotion of black bears is significantly more efficient than the locomotion of sloth bears.
E.    The habitat of black bears consists of terrain that is significantly more varied than that of the habitat of sloth bears
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答案是D,我想选E,前面不是说了polar bears’ locomotion is similarly inefficient嘛

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回复 2# coldlee


    问题问的是“Furthermore … sloth bear cubs”,即,(前提:)s bears和b bears在daily movement上有点什么相似,(结论:)暗示了如果b bear的cub怎样,那么s bear的cub就怎么样。答案D给出了他因,说b bears比b bears怎样,即是有差异的(不相似)。进而削弱了结论。
E选项好像完全不沾边啊。

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