题目内容

麻花钻的顶角越大,钻头尖端强度()(填“大”或“小”),前角会变()(填“大”或“小”),但钻削时轴向抗力()(填“大”或“小”)。

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在刀具切削部分的组成中,刀具前角是在()内测量的。

A. 切削平面
B. 正交平面
C. 假定工作平面
D. 基面

硬度试验中,采用硬质合金压头的是()硬度。

() not only he but also you going to attend the party tomorrow?

Are
B. Is
C. Were
D. Was

() hard she tries, she can hardly avoid making mistakes in her homework.

A. While
B. However
C. As
D. Although

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