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"The historical turning point of Russia and Japan" The struggle of the proletariat and the strengthening of bourgeois rule PPT courseware 5
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2023-09-25 18:25:58
"The Establishment of the Anti-Fascist Alliance and the Turning Point of the Great War" China's Anti-Japanese War and the World Anti-Fascist War PPT
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2023-09-25 17:35:36
"Nitrogen Cycle" Nature and Transformation of Matter PPT (Lesson 1 Nitrogen Cycle in Nature Nitrogen and Nitrogen Oxides)
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2023-09-25 17:34:00
"Nitrogen Cycle" Nature and Transformation of Matter PPT (Lesson 3: The Impact of Nitric Acid Human Activities on the Nitrogen Cycle and the Environment)
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2023-09-25 17:34:00
"Diversity of Iron" PPT courseware on the properties and transformation of matter (lesson 2 iron, iron oxides and iron hydroxides)
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2023-09-25 17:34:01
"Sulfur and Its Compounds" Important non-metallic elements in chemical production PPT (Lesson 3: Transformation of sulfur-containing substances in different valence states)
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