【简答题】What should we do to engage in academic writing?
【单选题】—Can you go to the cinema with us tonight? — . I might help my mother do the housework.
【判断题】MF-47型万用表测电阻时,红表笔是表内电池正极。( )
【简答题】(13分)科学家预言,燃料电池将是21世纪获得电力的重要途径。一种乙醇燃料电池是采用铂或碳化钨作为电极催化剂,在氢氧化钾溶液的电解液中直接加入纯化后的乙醇,同时向一个电极通入空气。回答下列问题: (1)这种电池放电时发生的化学反应方程式是_____________________________。 (2)此电极的正极发生的电极反应式是________________________________...
【单选题】I can help my mother do some things like ______ the rooms. A. cleans B. cleaning C. clean
【简答题】听录音,给短文排序。 ( ) I like to help my mother. ( ) I dry the dishes with the towel. ( ) I ask her, ' Can I help you, Mum? ' ( ) My mother is washing the dishes in the kitchen. ( ) ' Sure...