【简答题】设计实验方案,鉴别己烷、己烯、乙醇、溴乙烷四种无色液体。
【简答题】由于地面摩擦力的影响,实际风向与地转风向有偏角,在陆地上偏角约为:( )°-( )°
【单选题】Lily often ____________ dinner at 9: 00. [ ]
【单选题】— Have you ever been to Shanghai? — Yes. I there with my father last year.
【单选题】—Have you ever been to Canada? —Yes, I _____ there last year with my parents. [ ]
【单选题】— Have you ever been to Nanning? — Yes, _______ .