具有疏散风热,清肺润燥,平肝明日,凉血止血功效的药为
A.蝉蜕B.薄荷C.蔓荆子D.桑叶E.菊花
参考答案:D
They were surprised that a child should work out the problem _____ they themselves couldn’t.
A.when
B.where
C.until
D.while
股票的市场价格与其每股税后利润之比为()。
A.换手率
B.成交额
C.买手与卖手
D.市盈率