已知甲、乙、丙、X是4种中学化学中常见的物质，其转化关系符合下图。则甲和X（要求甲和X互换后也能符合要求）是 ①Na 2CO 3溶液和稀盐酸；②Cl 2和Fe；③C和O 2；④SO 2和NaOH溶液；⑤AlCl 3溶液和NaOH溶液

试卷相关题目

SQL Error: select id,body,options from ***_enewstiku_ where sourceid='21774' and id < 1896148 and id<>'1896148' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='21774' and id > 1896148 and id<>'1896148' order by id asc limit 5