同时减轻心脏前后负荷，产生有益血液动力学效应的扩血管药物是（）
A.消心痛
B.肼苯哒嗪
C.硝酸甘油
D.酚妥拉明
E.哌唑嗪
参考答案：E
—Do you know_________?
— He has gone to the museum.
A．where he lives
B．where he is
C．how he is getting on
D．what’s wrong with him
静脉瓣
