54

　　55

　　They have found that even if their patients do not really feel like laughing , making them smile is enough to produce beneficial effects similar to those caused by laughter.

　　Laughter can prolong（延长）one’s life.

　　B. As a result of these discoveries, some doctors in the United States now hold laughter clinics in which they help to improve their patients’condition by encouraging them to laugh.

　　C. The reason why laughter can reduce pain seems to be that it helps to produce a kind of chemicals in the brain which diminish(减少) both stress and pain.

　　D. It increases blood pressure ,the heart beating and breathing ,it also works several groups of muscles in the face, the stomach and even the feet.

　　E. Although laughter helps cure the disease, doctors still can not put this theory into clinic practice.

　　F. Laughter is the best medicine.

　　G. They have found that laughter really can improve people’s health.

　　A B C D

　　A B C D

　　A B C D

　　A B C D

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　　2 ○ ○ ○ ○ 22 ○ ○ ○ ○ 42 ○ ○ ○ ○

　　3 ○ ○ ○ ○ 23 ○ ○ ○ ○ 43 ○ ○ ○ ○

　　4 ○ ○ ○ ○ 24 ○ ○ ○ ○ 44 ○ ○ ○ ○

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