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"Transformation of Sulfur" Properties and Transformation of Matter PPT (Sulfur Dioxide in Nature in the First Lesson)
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2023-09-25 17:34:01
"Sulfur and Its Compounds" Important non-metallic elements in chemical production PPT (Lesson 1 Sulfur and Sulfur Dioxide)
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2023-09-25 17:34:00
"Transformation of Sulfur" Nature and Transformation of Substances PPT (Second Lesson: Sulfuric Acid Rain and Its Prevention and Control)
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2023-09-25 17:34:01
"Conversion of Sulfur" Nature and Transformation of Substances PPT (Lesson 2: Sulfuric Acid Rain and Its Prevention and Control)
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2023-09-25 17:34:01
"Sulfur and Its Compounds" Important non-metallic elements in chemical production PPT (Test of sulfate ion in lesson 2)
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2023-09-25 17:34:00
"Transformation of Sulfur" Nature and Transformation of Matter PPT (Lesson 1 Sulfur elements in different valence states in nature and the transformations between them)
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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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"Turning Toys" PPT Courseware
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"Regional Changes" Life Changes PPT
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"Phenomena Accompanying Chemical Changes" Changes in Matter PPT
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"Changes of Water" PPT courseware on changes in matter
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"Changes on the Earth's Surface" PPT
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"Changes of Matter" PPT
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"Changes of Candles" PPT
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"The Evolution of Biology" PPT
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"Evolution of Biology" PPT
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"Changes in Water" Changes in Matter PPT Courseware 2
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"Changes in Water" Changes in Matter PPT Courseware 2
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"Wonderful Changes" PPT courseware on changes in matter
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"Phenomena Accompanying Chemical Changes" PPT download of changes in matter
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"Cultural Communication in Life" Changes in Life PPT
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"Three State Changes of Water" Changes in Temperature and Water PPT
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"Transformation of Matter" Classification and Transformation of Matter PPT
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"Three State Changes of Water" PPT
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"Social Changes in Industrialized Countries" PPT
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"Phenomena Accompanying Chemical Changes" PPT teaching courseware on changes in matter
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"The Process of Biological Evolution" PPT courseware on the evolution of living things
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"Changes in Baking Soda and White Vinegar" Changes in Substances PPT
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"Causes of Biological Evolution" Biological Evolution PPT Courseware
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"Causes of Biological Evolution" Biological Evolution PPT Courseware
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"The Process of Biological Evolution" PPT courseware on the evolution of living things
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2019-02-03 23:00:00
"Vaporization and Liquefaction" PPT
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"The Ice Melts" Changes in Temperature and Water PPT
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"The Ice Melts" Changes in Temperature and Water PPT
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"Phenomena Accompanying Chemical Changes" Changes in Matter PPT Courseware
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"Internal Energy" Mechanical Energy, Internal Energy and Its Transformation PPT Courseware 3
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"Causes of Biological Evolution" Biological Evolution PPT Courseware 4
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"Causes of Biological Evolution" Biological Evolution PPT Courseware 3
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