由外胚层发育而来的器官是( )A.消化系统B.前庭C.循环系统D.神经系统E.阴道下段

作者: rantiku 人气: - 评论: 0
问题 由外胚层发育而来的器官是( )
选项 A.消化系统 B.前庭 C.循环系统 D.神经系统 E.阴道下段
答案 D
解析

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