题目

要除去下列物质中所含有的少量杂质，所选用的试剂和方法错误的是（）序号物质杂质试剂方法A蒸馏B、浓加热CNaOH溶液洗气D饱和溶液洗气 A . A B . B C . C D . D 答案：B_____enough thought to who the readers of the book would be，the publisher made a wrong     decision and suffered a heavy financial loss．     A．Not giving    B．Not being given    C．Having not given    D．Not having given