书面表达One possible version:NOTICEA sports meeting will be held in the playground of our school from next Thursday to FridayAs you know, the pressure of study is very heavy now, especially for those senior 3. So the purpose of the sports meeting is to letevery student get relaxed, as a result of which we students can live happily and heal thilyEveryone is welcome to take part in it. Those who perform excellently at the sports meeting will get prizes. But don' t take theresults so serously because taking part is more important than the result. Good luck to everyone!

2D【解析】实验①中发生反应的离子方程式为Ag++SCN= AgSCN↓.A正确;取上层清液加入Fe3,溶液出现红色,溶液中含有SCN-,实验①中AgNO3溶液过量,说明白色沉淀 AgSCN(s)在溶液中存在溶解平衡AgSCN(s)Ag+(aq)+SCN(aq),B正确;实验③中颜色变化说明有∧gI生成.C正确;因在实验①中硝酸银过量,余下的浊液中含有过量的银离子,与KI反应生成黄色沉淀,不一定是由 AgSCN转化而生成的AgI,因此不能证明AgI比 AgSCn更难溶,D错误。故选D。

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