半夏泻心汤的组成药物中含有（）
A.细辛
B.大戟
C.甘遂
D.厚朴枳实
E.人参干姜
参考答案：E
—When will Diana arrive?
—Oh, she . She is in the meeting room now.
A．arrives
B．is arriving
C．arrived
D．has arrived
大电流接地系统发生接地故障时，三相短路电流是否一定大于单相短路电流？为什么？
