具有芳香开窍、行气止痛的功用是（）
A.安宫牛黄丸
B.苏合香丸
C.至宝丹
D.行军散
E.紫雪丹
参考答案：B
We had a really bad time about six months ago but now things are ________．[ ]
A．looking up
B．coming up
C．making up
D．turning up
WMZ-41型微机母线差动保护电压闭锁的作用是什么？其判据如何？
