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下载 131 次
2023-09-20 15:21:03
"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
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2023-09-20 15:21:03
"Atmospheric Heating Process and Thermodynamic Circulation" Physical Geographic Elements and Phenomenon PPT (Second Lesson Thermodynamic Circulation and Atmospheric Movement)
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2023-09-25 18:24:41
"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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2023-09-25 17:33:59
"Chlorine and its Compounds" Important elements in seawater - sodium and chlorine PPT (Lesson 2 Laboratory preparation method of chlorine gas and test of chloride ions)
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2023-10-05 09:46:46
"Chlorine and its Compounds" Important elements in seawater - sodium and chlorine PPT (Lesson 2 Laboratory preparation method of chlorine and test of chloride ions)
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2023-09-25 18:21:26
"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
"The Nature of Seawater and the Impact of its Movement on Human Activities" Physical Geographic Elements and Phenomenon PPT (The Nature of Seawater and its Impact on Human Activities in the First Lesson)
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2023-09-25 18:24:41
"The Nature of Seawater and the Impact of its Movement on Human Activities" Physical Geographic Elements and Phenomenon PPT (The Movement of Seawater and its Impact on Human Activities in the Second Lesson)
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2023-09-25 18:24:40
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