使激动剂的最大效应降低
A．拮抗剂B．激动剂C．部分激动剂D．非竞争性拮抗剂E．竞争性拮抗剂
参考答案：D
根据答句写问句。
1. A:____________________________?
B: My mother's birthday is in August.
2. A:_____________________________?
B: No, my birthday is in December.
3. A:_______________________________?
B: National Day is October 1st.
4. A:_______________________________?
B: Today is November 4th.
5. A:_______________________________?
B: My birthday is in winter.
简述资产负债互换的交易机制。
