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问题 单项选择题

有机磷酸酯类中毒时，M样作用产生的原因是：

A．胆碱能神经递质破坏减少

B．胆碱能神经递质释放增加

C．直接兴奋胆碱能神经

D．M胆碱受体敏感性增加

E．以上都不是

答案

参考答案：A

填空题

用所给词的适当形式填空。

1. I spent an hour             (mend) my bike.

2. I             (be) to Beijing twice before.

3. I am sorry             (trouble) you.

4. The old woman              (die) for about ten years.

5. Would you mind              (open) the door?

6. Two weeks              (be) a long time.

7.Would you like              (come) with me?

8. He has something interesting             (tell) you.

9. My mother hates              (travel) by plane.

10. We went to the zoo              (watch) the animals yesterday.

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单项选择题

室内小气候的组成因素不包括

A．气流

B．气湿

C．气温

D．热辐射

E．空气离子
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