单项选择题
A.800ml B.1000ml C.1200ml D.1500ml E.1800ml
A.1000ml B.1300ml C.1600ml D.2000ml E.2500ml
A.基线胎心率变异消失 B.CST阳性 C.羊水胎粪污染 D.胎动异常 E.羊水过少