【多选题】湖泊完全混合衰减模式的适用条件是( )。
【单选题】___ impressed me most about the woman was that she looked after the old man for twenty years without any complaint.
【单选题】_impressed me most was the scenery of Changbai Mountains. [ ]
【多选题】下列属于或能表征非持久性污染物的是( ) 。
【单选题】地表水评价中,非持久性污染物的降解系数是( )。
【单选题】半衰期较短,生物蓄积能力较小的有机污染物被称为()?
【单选题】Tom:I went to a car exhibition. The hydrogen car impressed me most. Mud:Hydrogen car? You mean the car will burn hydrogen?Tom:______.
【单选题】He spoke confidently, ______ impressed me most.