题目内容

已知两圆柱正交(轴线垂直相交),如图所示,三视图中相贯线的已知投影有几个。

A. 1个
B. 2个
C. 3个
D. 无法分析

查看答案
更多问题

两圆柱面相交产生的相贯线形式有?

A. 外表面和外表面相贯
B. 内表面和内表面相贯
C. 内表面和外表面相贯
D. 不能确定

The next-door neighbours are so ___________that we have stopped trying to talk to them. (friend)

No, this is not the original; it’s a good ___________ , though. (produce)

We’d better go by train. The car is too_________ for such a long journey.(rely)

答案查题题库