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"Photosynthesis absorbs carbon dioxide and releases oxygen" Carbon-oxygen balance in green plants and biosphere PPT courseware 7
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"Photosynthesis absorbs carbon dioxide and releases oxygen" Carbon-oxygen balance in green plants and biosphere PPT courseware 4
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"Nitrogen and Its Compounds" Important non-metallic elements in chemical production PPT (Lesson 3: Nitric acid rain and its prevention and control)
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"Sulfur and Its Compounds" Important non-metallic elements in chemical production PPT (Test of sulfate ion in lesson 2)
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"Three-dimensional Figures and Plane Figures" Preliminary PPT of Geometric Figures (Look at the expansion of three-dimensional figures and three-dimensional figures from different directions in the second lesson)
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"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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"Commonly Used Logical Terms" Sets and Commonly Used Logical Terms PPT (Lesson 2: Negation of universal quantifier propositions and existential quantifier propositions)
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2019 extremely simple investment promotion cooperation plan business activities sports event assembly exhibition project sponsorship investment promotion plan event publicity general PPT template
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