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Re:用一般式判断的时候记住重合的充要条件是 A2B1-A1B2==0 && A1C2-C1A2==0 && B1C2-C1B2==0In Reply To:用一般式判断的时候记住重合的充要条件是 A2B1-A1B2==0 && A1C2-C1A2==0 && B1C2-C1B2==0 Posted by:PoPoQQQ at 2014-09-11 19:30:58 > 后面不能只判断一个 thank you very much！！！ Followed by: Post your reply here: |
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