应用武火速煎的是（）
A.解表药
B.清热药
C.泻下药
D.祛湿药
E.开窍药
参考答案：A
It was in the school ____ he had studied ____ he began the important experiment.
A．that; where
B．in which; which
C．where; that
D．where; in which
简述引起产后出血的原因。
