经行风疹块的病因病机是（）
A.气虚
B.风热
C.血瘀
D.风寒
E.血虚
参考答案：B, E
— Sorry, I’m late. Has the film begun?
— It doesn’t matter. The film _________ for several minutes.
A．has just begun
B．has just been over
C．has just been on
D．has just ended
企业在进行物流成本的日常控制时应遵循哪些原则？
