2. 外语
  3. It has been proved all of the following except that ______. The purpose of doctors holding laughter clinics is ______.

It has been proved all of the following except that ______. The purpose of doctors holding laughter clinics is ______.

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问题 It has been proved all of the following except that ______.
The purpose of doctors holding laughter clinics is ______.
选项 A、to give better condition to their patients
B、to improve patients’ health
C、to make patients smile
D、to prove smile and laughter have the same effect
答案B
解析 参见最后一段。
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成人本科学位英语

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