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两个铅垂面的交线是一条正垂线。
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两个铅垂面的交线是一条正垂线。
A、正确
B、错误
时间:2021-09-01 23:20
关键词:
青书学堂
河北建筑工程学院
画法几何与工程制图1(高起本)
答案解析
B
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