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题目内容
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.
- Afunctional
- Bkeen
- Cserviceable
- Dprecise
- Eadaptable
- Fmalleable
A,C显示答案
以上解析由 考满分老师提供。