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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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"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" Properties and Transformation of Matter PPT (Sulfur Dioxide in Nature in the First Lesson)
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2023-09-25 17:34:01
"Carbon Dioxide" PPT
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"Transformation of Sulfur" Nature and Transformation of Substances PPT (Second Lesson: Sulfuric Acid Rain and Its Prevention and Control)
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"Carbon Dioxide" PPT
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"Carbon Dioxide" PPT
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"Carbon Dioxide" PPT
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2023-10-05 09:28:40
"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
"Carbon Dioxide and Carbon Monoxide" Carbon and Carbon Oxides PPT (Lesson 2)
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2023-09-20 15:17:50
"Carbon dioxide and carbon monoxide" Carbon and carbon oxides PPT (Lesson 1)
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2023-10-05 09:29:15
"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
"Oxidation and Combustion" PPT
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2023-10-05 09:45:59
"Conversion of Sulfur" Nature and Transformation of Substances PPT (Lesson 2: Sulfuric Acid Rain and Its Prevention and Control)
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"Oxidation and Combustion" PPT
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2023-09-25 18:16:33
"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
"Carbon dioxide and carbon monoxide" Carbon and carbon oxides PPT (Lesson 1)
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2023-10-05 09:29:15
"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
"Carbon Dioxide" PPT courseware
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2023-10-05 09:28:41
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