【简答题】we’ve all heard how interesting Internet Shopping can be; that you can get things far cheaper than those you buy in real shops. How convenient it is – you can shop when you want to. You can find many ...
【单选题】.在选择形位公差的公差等级时,通常采用______法 。( )
【单选题】在选择形位公差的公差等级时,通常采用( )法。