题目内容

关于绒毛膜的描述，正确者

A. 丛密绒毛膜与基蜕膜一起构成胎盘
B. 丛密绒毛膜与包蜕膜一起构成胎盘
C. 绒毛膜滋养层细胞过度增生，可出现葡萄胎
D. 绒毛间隙内充满了来自子宫螺旋动脉的母体血
E. 胚胎早期整个绒毛膜就有平滑绒毛膜和丛密绒毛膜之分

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