产后恶露不绝的常见病机有（）
A.血瘀
B.血虚
C.血热
D.气虚
E.气郁
参考答案：A, C, D
—Have you finished your homework yet?
—Yes. I _________ it twenty minutes ago.
A．have finished
B．finished
C．will finish
D．had finished
如何进行PdCV-178的手动、自动切换？
