回复：谢谢您的答复！我也认为是这四种。简称为相离，相交，包含和相等。

来源: 于 2010-07-23 12:55:37 [旧帖] [给我悄悄话] 本文已被阅读：次

Ha,interesting,my answer was totally for another question.
At first,I wonder why did you ask so simple question,,,,maybe you want to know deeper....So I did...