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"The Origin and Evolution of Humanity" PPT courseware
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"Preliminary Understanding of Chemical Elements" Representation of Chemical Elements and Substance Composition PPT Courseware
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"Nitrogen Cycle" Nature and Transformation of Matter PPT (Lesson 1 Nitrogen Cycle in Nature Nitrogen and Nitrogen Oxides)
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"Mutation of Organisms" Heredity and Variation of Organisms PPT Courseware 5
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"Mutation of Organisms" Heredity and Variation of Organisms PPT Courseware 6
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"The Origin and Evolution of Humanity" PPT download
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"Cell Division and Differentiation" PPT courseware
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"Changes and Differences in Temperature" PPT courseware
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"Digestion and Absorption of Food" PPT courseware
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"Exploring the law of synthesis of two forces at an angle to each other" Force and Balance PPT
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"Changes in Economic and Social Life" PPT
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"Conversion and Conservation of Energy" Utilization of Internal Energy PPT Courseware 4
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"Conversion and Conservation of Energy" Utilization of Internal Energy PPT Courseware 2
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"Changes of Coordinates and Graphics" PPT courseware
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"Changes and Differences in Temperature" PPT Courseware
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"Cell Division and Differentiation" PPT download
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"Changes and Differences in Precipitation" PPT courseware
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"Preliminary Understanding of Chemical Elements" Representation of Chemical Elements and Substance Composition PPT Courseware
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"Conversion and Conservation of Energy" Utilization of Internal Energy PPT Courseware 5
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"What changes have occurred in matter" Changes in matter PPT
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"The Rise of Chinese Culture (2)" The emergence of the country and the transformation of society PPT courseware
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"Material Changes and Us" Material Changes PPT Download
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"Material Changes and Us" Material Changes PPT Courseware
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"What changes have occurred in matter" Changes in matter PPT
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"The Rise of Chinese Culture" The emergence of the country and the transformation of society PPT courseware 3
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"The Rise of Chinese Culture" The emergence of the country and the transformation of society PPT courseware 5
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"The Rise of Chinese Culture" The emergence of the country and the transformation of society PPT courseware 7
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"Organic Synthetic Materials" Chemistry and Life PPT Courseware 2
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"Organic Synthetic Materials" Chemistry and Life PPT Courseware 4
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"The Rise of Chinese Culture" The emergence of the country and the transformation of society PPT courseware 2
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"The Rise of Chinese Culture" The emergence of the country and the transformation of society PPT courseware 4
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