茯苓抗肝硬化的有效成分是()
A.茯苓醇
B.茯苓多糖
C.茯苓素
D.泽泻醇
E.泽泻素
参考答案:A
(2012·陕西)—I'm sorry for being late.I should have phoned you earlier.
—________.I've just arrived.
A.That's no trouble
B.You are welcome
C.That's all right
D.You can never tell
在接触网作业车开车前,在缓解位时,总风缸压力表指针数值为500kPa。