【判断题】已知吡啶的Kb=1.7×10-9,其共轭酸的Ka=1.2×10-6
【简答题】It’s April 13th. It’s Mary’s birthday. (A) She and her mother go to a big city by bus . They see many clothes stor es and hotels there. They come to a clothes store first. (B) Mary’s mother buys a red...
【单选题】Mary’s skirt is the same as her____.
【简答题】请大家以小组为单位提交每个省份的信息技术、通用技术、综合实践课程的开课情况。请在周三晚上提交完毕。
【单选题】已知吡啶的 K b =1.7 × 10 -9 ,其共轭酸的 K a :
【单选题】已知吡啶的 =1.7×10 -9 ,其共轭酸的 = 。