第30题: [单项选择]某32岁孕妇,孕产史G3P1,经阴道分娩产程进展顺利,胎儿娩出后已达30分钟,胎盘未娩出,亦无剥离现象,阴道无出血。最可能的原因是胎盘 () A. 剥离不全 B. 植入 C. 嵌顿 D. 剥后滞留 E. 部分性粘连 参考答案:B
第31题: [单项选择]Ullage measurements are taken from the top of the liquid to(). A. the base of the expansion trunk B. the base of the ullage port C. a line scribed within the ullage port D. an above-deck datum,usually the top of the ullage hole 参考答案:D