为阿片受体拮抗剂，临床用于吗啡等引起的呼吸抑制的解救的是（）.
A．芬太尼
B．吗啡
C．哌替啶
D．美沙酮
E．纳洛酮
参考答案：E
—Must I arrive at school at one o'clock in the afternoon?
—No, you_______. [ ]
A. mustn't
B. needn't
C. can't
D. shouldn't
何为复式励磁？
