【简答题】润湿接触角小于90°的为( )颗粒,不易与气泡产生黏附;润湿接触角大于90°的为( )颗粒,气浮体结合牢固不易脱落。
【单选题】按润湿接触角的定义,若接触角等于115度,则岩石表面润湿性为() 。 亲水表面
【单选题】矿物表面润湿接触角直接决定矿物的可浮性,其润湿接触角(),则矿物的疏水性强,易浮;接触角(),则矿物的()难浮。
【单选题】计算机硬盘在工作时应该特别注意避免______
【单选题】— What ______ your bike yesterday? — It didn't work. [ ]
【简答题】何为润湿接触角,接触角与界面张力的关系,对可浮性的影响。
【单选题】—What happened _ her? —Nothing happened. Don't worry. [ ]
【简答题】She didn’t come to school yesterday .Do you know what ___her? has happened with B. had happened with C. had happened to D. has happened to