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磨削能够加工高硬度的材料是因为( )。

单选题
2021-09-01 19:02
A、磨粒硬度高
B、砂轮硬度高
C、结合剂硬度高
D、砂轮组织紧密
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正确答案
A

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磨削能够加工高硬度的材料是因为( )。
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