题目

物质的检验、除杂和鉴别是化学实验的基本技能，下列实验操作能达到实验目的的是（）选项实验目的实验操作A检验溶液中的取样，向其中加入溶液B除去附着在试管内壁的硫加水冲洗C鉴别与固体取样，分别与熟石灰混合研磨，闻气味D鉴别溶液与溶液取样，分别向其中滴加溶液 A . A B . B C . C D . D 答案：C --- Whenyou free last week?--- Well, Ihave a free day because there was too much work.A. did, didn’tB. were; didn’tC. were, wasn’tD. did, wasn’t