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"Physical Quantities Commonly Used in Chemistry—Amount of Substances" Understanding Chemical Science PPT Courseware (Lesson 3: Amount and Concentration of Substances)
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"How animals and plants spend the winter" PPT courseware on changes in the four seasons
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"Prosperous Qin and Han Culture (1)" PPT courseware on the establishment of a unified country
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"The Great Ancestors" Unique Chinese Culture PPT Courseware 3
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"The Great Ancestors" Unique Chinese Culture PPT Courseware 2
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"The Properties and Uses of Carbon Dioxide" The World of Carbon PPT Courseware 2
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"Description of Speed Changes - Acceleration" Motion Description PPT
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