题目内容

车削时,工件端面与轴线的垂直度要求,取决于车床横溜板导轨与工件回转轴线的垂直度。()

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Mr. White: __________, Tom. We are glad to have you. Now I ’m sure you ’re excited to be back home soon.
Tom: Oh, yes.

A. Don’t say that
B. It ’s very kind of you to say that
Come on
D. That’s all right

设计零件结构时,应尽量选用标准件。()

一般说来,越是精加工,工序余量越大。()

在具体设计零件结构时,应注意刀具的引进和退出要方便。()