属于祛风除湿的代表方是：
A．独活寄生汤B．通窍活血汤C．龙胆泻肝汤D．消风散E．麻桂各半汤
参考答案：D
There were some dogs, .[ ]
A.some chicken and some sheep
B.some chicken and some sheeps
C.some chickens and some sheep
D.some chickens and some sheeps
蒸汽网路中某一管段，通过流量为4t/h，蒸汽平均密度4kg/m3，从蒸汽管道水力计算表（表中蒸汽密度为1.0kg/m3）中查得：当流量为4t/h，选用φ108×4时，对应的比摩阻为2432.2Pa/m，流速为142m/s，则其比摩阻为（）。
A．585.6Pa/m
B．1171.2Pa/m
C．49.3Pa/m
D．34.2Pa/m
