搜题请搜索小程序“爱下问搜题”
问题 单项选择题 A1型题

保列治治疗前列腺增生的机制是（）

A.抑制α受体

B.抑制β受体

C.抑制5-α还原酶

D.抑制γ受体

E.抑制雄性激素受体

答案

参考答案：C

解析：保列治是通过抑制5-α还原酶，减少睾酮向双氢睾酮转化，从而抑制前列腺的增生。

解答题
已知关于x，y的方程组
3x-y=5
4ax+5by=-22
和
2x+3y=-4
ax-by=8
有相同解，求（-a）b值．
查看答案
填空题

用所给词的适当形式填空。

1. By the time I got to the bus stop, the bus had already _______ (leave).

2. They _______ (make) a lot of friends since they came to our school.

3. She was so ________  (embarrass) that he didn't know what to say at the moment.

4. They have been _______ (marry) since eight years ago.

5. That's the ________ (end) of the story.

6. The mice all _______ (flee) away when the cat appeared.

7. We _______(learn) eight units by the end of last week.

8. It is three years since he ________ (leave)

9. My sister _______ (watch) TV when I ________ (get) home yesterday.

10. Keep quiet. Dad _______ (listen) to the news now.

查看答案