关于羊水的描述，错误的是（）。

A.妊娠早期羊水主要来自母体血清经胎膜进入羊膜腔的透析液

B.妊娠中期起羊水来自胎儿尿液

C.羊水最大深度≤3cm，羊水指数≤5cm诊断为羊水过少

D.胎儿中枢神经系统畸形常合并羊水过多

E.胎儿消化系统畸形常合并羊水过少

"Is Mary from New York City " "I don't know _______."

A．from what city does she come from

B．from what city she come

C．what city does she come from

D．what city she comes from