2. 外语
  3. What is said about the communicative functions of laughter? Laughter can be a way of body exercise if people ______.

What is said about the communicative functions of laughter? Laughter can be a way of body exercise if people ______.

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问题 What is said about the communicative functions of laughter?
Laughter can be a way of body exercise if people ______.
选项 A、laugh much more than they do in everyday
B、laugh much louder than they do in everyday
C、receive special training in how to laugh
D、learn to laugh while doing other exercises
答案A
解析 根据题干body exercise定位到原文最后一句。body workout。从第四段第九句可以推知，每天上百次的笑才能达到一定的活动量，而第二段指出成年人平均每天才笑17次，A与之相符。B可能是事实，但不能直接从原文推断出来。
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