下列各组离子在指定溶液中，能大量共存的是 （   ）

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SQL Error: select id,body,options from ***_enewstiku_ where sourceid='21205' and id < 1840908 and id<>'1840908' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='21205' and id > 1840908 and id<>'1840908' order by id asc limit 5