必修五2019-2020学年度人教版必修五Unit1Great scientistsPeriod5Using language课件(43张)
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Qian is one of the pioneers of China's space science. A world- famous expert on aerospace rockets and aerodynamics, Qian has obtained great attainments in the areas of applied mechanics, engineering cybernetics and system engineering and made distinguished contributions to the foundation and development of Chinese aerospace undertaking.