2. 外语
  3. A、Laughing is a learned behavior. B、Laughing is a good medicine to patients. C、Laughing is easier than battling with an illness.

A、Laughing is a learned behavior. B、Laughing is a good medicine to patients. C、Laughing is easier than battling with an illness.

admin2021-09-16  50
问题
选项 A、Laughing is a learned behavior.
B、Laughing is a good medicine to patients.
C、Laughing is easier than battling with an illness.
D、Laughing is something people can do without effort.
答案B
解析
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