2. 外语
  3. Although fish have no vocal organs, they still are able to make noises.

Although fish have no vocal organs, they still are able to make noises.

admin2012-07-30  86
问题 Although fish have no vocal organs, they still are able to make noises.
选项 A、signals
B、bubbles
C、sounds
D、ripples
答案C
解析 声，声音
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