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190315-燃烧的条件-08160248

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190329-氧化还原-22160834

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190524-氯及其化合物说课-08160226

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190614-醇的说课-08160236

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190621-氧化还原反应说课-92181660

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190326-时刻和时间间隔-22160707

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190326质点机械运动07160128

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190423-力的合成-22160735

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