【单选题】在胶体系统中, ζ 电势 ( ) 的状态,称为等电状态。
【简答题】各个单位的会计科目是完全不能增减设置的。( )
【单选题】The boy failed the exam because he _____ a lot of time playing the computer games.
【单选题】— Honey, please don't play the computer games. — Pardon? — I _____ play the computer games. [ ]
【简答题】各个单位的会计科目是完全不能增减设置的。( )
【简答题】各个单位的会计科目是完全不能增减设置的。( )