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"Understanding the Treasure Island of Taiwan" PPT courseware for the homeland of people of all ethnic groups in China
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"Generation of Electric Energy" Where does electric energy come from PPT courseware
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"Solar energy" energy and sustainable development PPT download
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"Gravity Potential Energy" Law of Conservation of Mechanical Energy PPT Courseware
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"National Unity and Regional Ethnic Autonomy" National Unity and Motherland Reunification PPT Courseware
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"Consolidation and Development of a Unified Multi-Ethnic State" Political changes in the Ming and Qing Dynasties and the consolidation of a unified multi-ethnic country PPT courseware
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