某溶液中，若忽略水的电离，只含有下表中所示的四种离子，试推 测X离子及其个数b可能为    

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SQL Error: select id,body,options from ***_enewstiku_ where sourceid='22490' and id < 1972841 and id<>'1972841' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='22490' and id > 1972841 and id<>'1972841' order by id asc limit 5