酸蚀后，釉质定性微孔层的深度大约是A. 10μm B. 20μm C. 30μm D. 40μm E. 50μm

作者: tihaiku 人气: - 评论: 0

问题酸蚀后，釉质定性微孔层的深度大约是

选项 A. 10μm B. 20μm C. 30μm D. 40μm E. 50μm

答案 B

解析

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