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Discuz Math Forum»Forum › Mathematics › High School › 2018年除夕就是今天2月15日星期四
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[数论] 2018年除夕就是今天2月15日星期四

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isee

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isee posted 2018-2-15 17:42 |Read mode
那么，2017年除夕是哪一天，又是星期几，2019年呢？要有过程咯。
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