A.直肠瓣B.肛乳头C.肛门瓣D.直肠柱E.肛隐窝主要作用是防止粪便逆行的是:

作者: rantiku 人气: - 评论: 0
问题 A.直肠瓣 B.肛乳头 C.肛门瓣 D.直肠柱 E.肛隐窝 主要作用是防止粪便逆行的是:
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答案 A
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