向稀硫酸中加入铜粉不发生反应，若再加入某种盐，则铜粉可以逐渐溶解。符合此条件的盐是(　　)

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SQL Error: select id,body,options from ***_enewstiku_ where sourceid='19557' and id < 1693853 and id<>'1693853' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='19557' and id > 1693853 and id<>'1693853' order by id asc limit 5