2. 外语
  3. A dolphin breathes through its ______. Engineers are studying the dolphin’s skin and shape ______.

A dolphin breathes through its ______. Engineers are studying the dolphin’s skin and shape ______.

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问题 A dolphin breathes through its ______.
Engineers are studying the dolphin’s skin and shape ______.
选项 A、to learn how fast it can swim
B、to discover the value of the dolphin
C、because dolphins are good swimmers
D、because they like swimming very much
答案C
解析
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大学英语三级B级

大学英语三级

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