强心苷主要用于治疗
A．充血性心力衰竭
B．完全性心脏传导阻滞
C．心室纤维颤动
D．心包炎
E．二尖瓣重度狭窄
参考答案：A
— Shall we meet at the station at 8 a.m.?
— In fact we _________. The train _________ until 10 a.m..
A．mustn’t; doesn’t leave
B．mustn’t; leaves
C．needn’t; won’t leave
D．needn’t; will leave
