牙釉质表面的主要无机物是A铁和锌 B钙和磷 C镁和钠 D氟和氯 E碳酸盐

作者: rantiku 人气: - 评论: 0

问题牙釉质表面的主要无机物是 A铁和锌 B钙和磷 C镁和钠 D氟和氯 E碳酸盐

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答案 B

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