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Re:谁帮我解释一下

Posted by phoenixzz at 2007-09-01 11:24:18 on Problem 3298
In Reply To:Re:谁帮我解释一下 Posted by:phoenixzz at 2007-09-01 11:23:30
> 1 2 3 4 5 取1或2或3或4或5
> 5 4 3 2 1 任取两个
> 5 1 4 2 3 全取
> 2 4 1 3 5 取213或215或413或415

还有435

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