下列关于铁及其化合物的说法中正确的是（   ）

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SQL Error: select id,body,options from ***_enewstiku_ where sourceid='19806' and id < 1718991 and id<>'1718991' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='19806' and id > 1718991 and id<>'1718991' order by id asc limit 5