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PFM瓷粉和合金的要求,以下哪项是错误的?

A、合金与瓷粉应具有良好生物相容性
B、烤瓷粉颜色应具有可匹配性
C、瓷粉的热膨胀系数应略小于烤瓷合金者
D、金属基底的厚度不能过薄
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正确答案:

D

答案解析:

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