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"What's in the Soil" Earth's Surface and Its Changes PPT Courseware 3
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"The Loveliest Person" The Establishment and Consolidation of the People's Republic of China PPT Courseware 4
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Electricity PPT courseware that is inseparable from "Electricity and Our Life"
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"Commonly used physical quantities in chemistry - the amount of matter" Understanding chemical science PPT (the application of the amount of matter in chemical reactions in the third lesson)
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"Commonly used physical quantities in chemistry - the amount of matter" Understanding chemical science PPT (the application of the amount of matter in chemical reactions in the third lesson)
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"The Loveliest Person" The Establishment and Consolidation of the People's Republic of China PPT Courseware 2
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