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211012-一元二次方程-212021113

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21101-函数的单调性-212021105

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211010-二次函数的概念-212021086

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211010-对数的概念-212040013

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211010-等比数列的前n项和-212021103

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211010-等差数列的概念-212021118

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211010-三角形全等的判定-212021122

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211010-三角函数的概念-212021100

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211010-任意角的三角函数-212021094

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20211010-线段垂直平分线的性质-212021116

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