试题与答案

钻石刻面棱线磨损,常因其受()擦磨造成。A.立方氧化锆 B.刚玉 C.钻石 D.水晶

题型:单项选择题

题目:

钻石刻面棱线磨损,常因其受()擦磨造成。

A.立方氧化锆

B.刚玉

C.钻石

D.水晶

答案:

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