【单选题】If you try to sit on two chairs,you will fall them For life,you must choose one chair.
【判断题】用氨作还原剂,选择性非催化还原法脱硝的反应温度远高于选择性催化还原法脱硝的反应温度。( )
【单选题】As a candidate, you must try to make a good ________ on everyone if you want to win the election.
【单选题】You must less meat. [ ]
【判断题】江泽民指出,走科技强军和精兵之路,关键是要科技强军。