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Re:[1,2] U [3,4] 和[1,4]一样吗In Reply To:[1,2] U [3,4] 和[1,4]一样吗 Posted by:longpo at 2008-07-27 11:58:16 > [1,2] U [3,4] 和[1,4]一样吗 不一样 > 如果【1，4】里减去 （2，3），结果会是什么？ [1,2] U [3,4] Followed by: Post your reply here: |
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