分娩一般分为()三个阶段。
A、开口期,
B、羊水期,
C、胎儿产出期,
D、胎衣排出期。
参考答案:A, C, D
He _____ after the doctor had almost given him up.[ ]
A. pulled down
B. pulled up
C. pulled through
D. pulled off
不具有制酸止痛的作用的药物是
A.海蛤壳B.瓦楞子C.石决明D.牡蛎E.乌贼骨