羊水过少为少于（)A.2000mlB.2100mlC.1000mlD.300mlE.250ml

羊水过少为单一羊水暗区垂直深度小于A.3cmB.7cmC.8cmD.20cmE.10cm

羊水过少为四象限羊水深度相加之和小于A.3cmB.7cmC.8cmD.20cmE.10cm

何项为羊水过少A 2000mlB > 2000mlC 1000mlD 500mlE

何项为羊水过少（　　）A.2000mlB.＞2000mlC.1000mlD.500mlE.

羊水过少为单一羊水暗区垂直深度小于

羊水过少为四象限羊水深度相加之和小于