鹿茸的功效是（）
A.补肾阴，益精血
B.补肾阳，益精血
C.补肾阴，祛风湿
D.补肾阳，祛风湿
E.补肾阴，止胎动
参考答案：B
(2013·济南一模)________ you are unable to deal with it, perhaps we should ask someone else for help.
A．Although
B．While
C．Since
D．Unless
CRH2A型动车组供电设备布置在4，6号车顶，电传动设备布置在2、3、4、6、7车的车底。
