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题目内容双击单词支持查询和收藏哦～
Since beavers rely on auditory signals such as the tail slap and whining and hissing, we can infer that their hearing is _____________, although we don't know the exact sensitivity and performance of their acoustical sense.
- A.functional
- B.keen
- C.serviceable
- D.precise
- E.adaptable
- F.malleable
A,C显示答案
以上解析由 考满分老师提供。
