将一小块钠投入下列溶液时，既能产生气体又会出现沉淀的是（   ）

试卷相关题目

SQL Error: select id,body,options from ***_enewstiku_ where sourceid='19980' and id < 1738551 and id<>'1738551' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='19980' and id > 1738551 and id<>'1738551' order by id asc limit 5