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  3. What is said about the communicative functions of laughter? Why is laughter generally believed to be the best medicine?

What is said about the communicative functions of laughter? Why is laughter generally believed to be the best medicine?

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问题 What is said about the communicative functions of laughter?
Why is laughter generally believed to be the best medicine?
选项 A、Because it keeps people away from falling ill.
B、Because it is an effective way to cure patients.
C、Because it increases the content of oxygen in blood.
D、Because it helps patients recover more quickly.
答案D
解析 根据题干the best medicine定位到原文第四段第一句。D与第三句assist healing同义。文中只说明笑有利于康复，而没有提是否能防病，故排除A；第二句help fight diseases说明笑只能对治疗起辅助作用，故排除B；第三句increase in oxygenation指提高血液中氧气的补充速度，而不是增加血液中氧气的含量，故排除C。
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