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"Inorganic Substances in Cells" PPT courseware of molecules that make up cells
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"The Meaning of Fractions" Preliminary Understanding of Fractions PPT Courseware
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"The Meaning of Fractions" PPT courseware for the preliminary understanding of fractions
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"The Meaning of Fractions" PPT courseware for the preliminary understanding of fractions
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"Nitrogen and Its Compounds" Important non-metallic elements in chemical production PPT (Lesson 2: Ammonia and ammonium salts)
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"Obtaining Organic Compounds from Fossil Fuels" Simple Organic Compounds PPT (Lesson 3: Retorting of Coal and Benzene)
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"Reunderstanding of Fractions (1)" PPT courseware on the meaning of fractions
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"Basic Properties of Fractions" PPT download of the meaning of fractions
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"The Meaning of Fractions" Preliminary Understanding of Fractions PPT Courseware
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"Obtaining Organic Compounds from Fossil Fuels" Simple Organic Compounds PPT (Lesson 3: Retorting of Coal and Benzene)
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"Inorganic Matter in Cells" PPT download of molecules that make up cells
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"Laboratory Preparation and Properties of Carbon Dioxide" PPT courseware
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