用惰性电极电解稀HNO 3、CuSO 4和NaCl的混合液，最初一段时间阴极和阳极上分别析出的物质是

试卷相关题目

SQL Error: select id,body,options from ***_enewstiku_ where sourceid='22256' and id < 1948750 and id<>'1948750' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='22256' and id > 1948750 and id<>'1948750' order by id asc limit 5