2. 外语
  3. It has been proved all of the following except that ______. The main topic of the passage is ______.

It has been proved all of the following except that ______. The main topic of the passage is ______.

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问题 It has been proved all of the following except that ______.
The main topic of the passage is ______.
选项 A、laughter and physical exercise have similar effects on the human body
B、smile can produce the same effects as laughter
C、pain can be reduced by laughter
D、laughter is the best medicine
答案D
解析 文章主题句是“Laughter is best medicine．”。
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成人本科学位英语

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