回複：謝謝您的答複！我也認為是這四種。簡稱為相離，相交，包含和相等。

來源: 於 2010-07-23 12:55:37 [舊帖] [給我悄悄話] 本文已被閱讀：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...