含氧最高的胎儿血管是（）A ．脐动脉 B ．脐静脉 C ．腹主动脉 D ．肺动脉 E ．股动脉

作者: rantiku 人气: - 评论: 0

问题含氧最高的胎儿血管是（）

选项 A ．脐动脉 B ．脐静脉 C ．腹主动脉 D ．肺动脉 E ．股动脉

答案 B

解析

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