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问题 单项选择题

检查某班15岁学生50名，其中患龋病者10人，龋失补牙数为：D=50，M=5，F=10，这班学生的患龋率为

A．10%

B．20%

C．30%

D．40%

E．50%

答案

参考答案：B

填空题

用括号中词的正确形式填空。

     A few weeks ago, a group of us decided __1__ (go) abroad together for a holiday. When we __2__  

 (wait) in the queue at passport control,  I suddenly __3__ (realize) that I _4___ (leave) my passport at

 home. I rang my parents, but they __5__ (work) in the garden. Luckily, my mother finally heard the

 phone. My passport __6__ (find) in my trousers pocket. My mother said, "If you take a taxi this minute

 you __7__ (be) able to get on the plane in time.  "I __8__ (run) all the way to the plane and when at last I

 __9__ (get) on it. the other passengers __10__ ( start) clapping.
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单项选择题

一位外科手术前的病人，坐卧不安，眉头紧锁，小动作多，这一现象是

A．应激的行为反应

B．应激的情绪反应

C．应激的生理反

D．应激的防御反应

E．以上都不是
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