试题与答案

圆多面琢型的钻石在磨钻时的损耗率约为()。A.25-30% B.30-35% C.3

题型:单项选择题

题目:

圆多面琢型的钻石在磨钻时的损耗率约为()。

A.25-30%

B.30-35%

C.35-40%

D.40-45%

答案:

参考答案:D

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