190315-质量守恒定律-22160820

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190315-燃烧的条件-22160808

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20200620-内力作用-22171006

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200623-营造地表形态的力量-22171018

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190326-速度：平均速度和瞬时速度-22160709

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200623 -10180633- 热孜亚

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190326-时刻与时间间隔-22160728

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190329-物质的分类-22160817

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190329-氧化还原反应-22160812

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