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问题详情

用5:1的比例画机件,若图纸上该机件长30㎜,则该机件实际长度为( )。

A、150 mm 

B、30 mm    

C、6 mm

D、25mm

时间：2021-07-17 23:56 关键词：发电厂及电力系统高起专机械制图 2020年第二学期补考机械电子工程专升本机械制图Ⅰ

答案解析

C

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