天南星治疗的病证是
A．凉血止血、祛痰止咳B．收敛止血、止痢杀虫C．凉血止血、解毒敛疮D．收敛止血、消肿生肌E．化瘀止血、活血定痛
参考答案：E
— He is too busy to help us finish the work.
— Let's do it _____. [ ]
A. itself
B. myself
C. ourselves
D. himself
在单发工作时，如果达到低油面：（）.
A.交输活门必须保持打开
B.交输活门必须关闭
C.另一发的燃油失去
D.交输活门自动保持打开
