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问题 单项选择题

阐述下列制备缓释制剂的原理

采用聚氯乙烯为骨架材料

A．制成溶解度小的盐
B．增加黏度以减小扩散速度
C．制成不溶性骨架
D．离子交换作用
E．溶蚀和扩散相结合

答案

参考答案：C

填空题

用适当的介词填空。

1. It’s my grandmother who cooks ________ us every day.

2. Her parents want her to marry the young man who is _______ a good family.

3. Who helps you _______ your homework in the evening?

4. My grandfather used to go to work ________ his bike.

5. They weren’t very rich, but they were happy _______ those days.

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单项选择题 A1型题

酸味药的作用是（）

A.止汗平喘

B.止泻止痢

C.固崩止带

D.固崩止遗

E.收敛固涩
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