题目内容
组合体三视图的绘制中，主视图的选择原则是：把最能反映组合体形状结构特征的方向作为主视图投影方向。
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在绘制组合体三视图中，每画一个基本体时，应先画反映该部分结构特征的视图。
在绘制组合体三视图中，完成各基本形体的三视图后，应检查形体间表面连接处的投影是否正确。
workspace, colleagues, discussion, respond, ignore, codesChoose the above words to fill in the gaps in these sentences.1 You should never___ your ___ but should say “good morning” when you arrive at the office.2 John had a very serious___ about working hours with the new trainee.3 If your ___is not big enough, you can always use the conference room for your meetings with the customer.4 One important___ you should follow is to ask for permission before taking somebody’s things.5 It is polite to___ if somebody asks you a question.
光栅栅距为0.02mm，经十倍频后，每一脉冲都相当于（）
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