清胃散中具有"升阳散火"作用的药味是()
A.利湿退黄
B.活血散瘀
C.清热泻火
D.泻下通腑
E.凉血止血
参考答案:B
It looks as if they are going to _________ us a lot of money for the concert hall.
A.demand
B.cost
C.charge
D.ask
专利权有哪几个特性?