2. 外语
  3. If the contagious nature of yawning is a means of communication within groups of animals, possibly as a means to ______ behavior

If the contagious nature of yawning is a means of communication within groups of animals, possibly as a means to ______ behavior

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问题 If the contagious nature of yawning is a means of communication within groups of animals, possibly as a means to ______ behavior, yawning in humans is most likely ______ and an evolutionarily ancient mechanism that has lost its significance.
选项 A、clarify... substantial
B、mirror... minimal
C、synchronize ... vestigial
D、temporize... analogous
E、interrupt... pernicious
答案C
解析
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