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"Conservation of Mass in Chemical Reactions" Quantitative Study of Chemical Reactions PPT Teaching Courseware
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"Exploration-Specific Heat Capacity of Matter" Mechanical energy, internal energy and their conversion PPT courseware
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"Transformation of Matter" PPT (Second Lesson)
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High-quality PPT courseware of the Law of Conservation of Mechanical Energy of "Expansion Course: Variable Force Work and Locomotive Start-up"
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"Energy, Environment and Sustainable Development" Energy and Energy Conservation Law PPT courseware
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"Transformation of Matter" PPT (first lesson)
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"Constants and Variables" PPT courseware
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"Classification and Transformation of Matter" Matter and its Changes PPT (Lesson 2: Transformation of Matter)
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"Where Does Energy Come From" Energy and Life PPT Courseware
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