问题
单项选择题
成人牙齿过早松动脱落的主要原因是
A．肾阳虚衰
B．肾阴亏虚
C．肾气不固
D．肾精不足
E．肾不纳气
答案
参考答案：D
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成人牙齿过早松动脱落的主要原因是
A．肾阳虚衰
B．肾阴亏虚
C．肾气不固
D．肾精不足
E．肾不纳气
参考答案：D
| 完形填空。 When someone asked me what business I am in, my face feels _ 1 . I envy (嫉妒) people who can s  ay that they are writers, bookkeepers and doctors. All these jobs speak for themselves.I really do make a living by 2 , and a good one, too. I can laugh like a king or like a school boy. It is a skill (技能) that I have learned. 3 the skill of mending shoes. Whenever and however laughter is needed. I am asked to do 4 . I laugh like a bus driver or a shopkeeper. I laugh 5 , kindly and happily. I need 6 point out that a job of this kind is tiring. I spend most evenings in nightclubs (夜总会). My job is to laugh during the 7 part of the show. My loud, hearty laughter must be timed carefully. It must not come too soon, 8 neither must be too late. I go through life quietly. I can 9 the laughter of others. I can laugh in many different ways. But I am not sure that I have ever heard the sound of 10 own laughter. | ||||
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