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除了最后一提，其他的都不难把？其实最后一提也不难，要不是我当时想成x1,x2一定要在x*的两端了......In Reply To:今天看了北京的数学题，果然丧心病狂。。。 Posted by:js05 at 2005-06-14 11:53:49 Followed by:
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