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190618-自由落体运动-22160728

Added by 22160728 6 年 ago

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190614-碳酸钠性质及应用说课-08160226

Added by 08160226 6 年 ago

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190423-力的分解-22160703

Added by 22160703 6 年 ago

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https://v.youku.com/v_show/id_XNDE1NTUyOTAyNA==.html?spm=a2hzp.8244740.0.0

190524燃烧的条件-20160105

Added by 20160105 6 年 ago

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190614-物质的量说课-08160225

Added by 08160225 6 年 ago

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190408-信息及其特征-22161905

Added by 22161905 7 年 ago

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