小儿佝倭病的主要病因是A.缺钙 B.缺乏维生素 C.早产 D.生长过快 E.食物中钙、磷比例不当

作者: tihaiku 人气: - 评论: 0
问题 小儿佝倭病的主要病因是
选项 A.缺钙 B.缺乏维生素 C.早产 D.生长过快 E.食物中钙、磷比例不当
答案 B
解析

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