老年环形成的原因是A.营养不良B.类脂质沉着C.铅中毒D.维生素A缺乏E.铜代谢障碍

作者: rantiku 人气: - 评论: 0
问题 老年环形成的原因是
选项 A.营养不良 B.类脂质沉着 C.铅中毒 D.维生素A缺乏 E.铜代谢障碍
答案 B
解析

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