A:MgCl2═Mg2++2Cl﹣
B:Fe2(SO4)3═2Fe3++3SO42﹣
C:NaHCO3═Na++H++CO32﹣
D:KHSO4═K++H++SO42﹣
She likes playing ________piano; her brother likes playing ________ basketball.
联合国确定的“国际禁毒日”是每年的( )
如图在盛有溴水的三支试管中分别加入汽油、四氯化碳和酒精,振荡后静置,出现下列现象,正确的结论是( )