心肌梗死后慢性心力衰竭可延长病人寿命的药物是（）
A.血管紧张素转换酶抑制剂
B.钙拮抗剂
C.β受体阻滞剂
D.利尿剂
E.洋地黄
参考答案：A, C
When I try to understand ______ that prevents so many Americans from being as happy as one might expect, it seems to me that there are two causes.
A．why it does
B．what it does
C．what it is
D．why it is
癫痫持续状态的首选药物为（）
A.乙琥胺
B.肌内注射苯妥英钠
C.静脉注射地西泮
D.戊巴比妥钠
E.水合氯醛
