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190428-全等三角形-22160907

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190428向量的概念及其表示22150648

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190523-基本不等式-21150612

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190523-三角形全等判定（ASA AAS）-22160621

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190613勾股定理10150114

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190425-反比例函数-92181606

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190428-椭圆-22150640

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