分流术后发生肝性脑病的原因有（）
A.氨中毒
B.静脉输液
C.疼痛
D.胃肠道出血
E.摄入大量蛋白质
参考答案：A, D, E
—He failed his exam again.
—But what did you _____? Had he ever been working hard?
A．think
B．expect
C．consider
D．imagine
白阀手把由运转位直接移到取柄位后，即换端操纵时有何危害（J2-7型）？
