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我!
redneck
(Cracker)
去喊姑姑和新卡们
(#12069300@0)
Last Updated: 2019-5-2
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坛子里有人会解决微积分问题吗？ 遇到一个问题想请教，想不通为什么同一个三角函数会有不同的积分结果？糊涂了。也许老了
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