楼主: cinderella
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奥林匹克数学题。。第31页。。来挑战吧! |
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^_^yeh^_^
wish u all happy forever!!! |
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归隐
子曰:危邦不入,乱邦不居。 天下有道则见,无道则隐。 故,予隐兮! |
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^_^yeh^_^
wish u all happy forever!!! |
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