南京市初中竞赛题，解题难？实则方法不对！掌握这个绝招，轻松搞定难题！
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清华附中自主招生题，学渣逆袭！99%人放弃的题目，3步轻松破解！解法太赚！
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签名：专注初中数学研究，持续介绍独到的解题方法、技巧技法。
