—Sorry,I have no time to help you cook.I have a lot of work to do.
—________You have been playing computer games all morning.
已知30℃时,氯酸钾的溶解度是10克,现欲配制55克氯酸钾的饱和溶液,需用氯酸钾固体和水各多少克?
下列实验中,加入试剂后不能产生特定颜色的是( )
给严重贫血的病人输血,最好输入( )