题目内容
选择零件图主视图的原则有:表示安装或工作位置、表示加工位置、表示结构形状特征。
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圆度是形状公差
允许尺寸的变动量称为形位公差
Fill in the blank with the word given below. Change the form where necessary. Each word can be used only once.1. Given the chance to show his ability, he regained _____ and began to succeed in school.
Fill in the blank with the word given below. Change the form where necessary. Each word can be used only once.2. It is so difficult to _____ the bottom of the ocean because some parts are very deep.
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