三七的止血功效是
A．凉血止血
B．收敛止血
C．化瘀止血
D．温经止血
E．养阴止血
参考答案：C
The fire was finally ______ after the building had ______ for two hours.
A．put off; caught fire
B．put away; been on fire
C．put out; been on fire
D．put out; caught fire
熟料粉化的原因？
