根据《物权法》规定，国家对不动产实行（）制度。

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SQL Error: select id,body,options from ***_enewstiku where sourceid='29159' and id < 2384772 and id<>'2384772' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='29159' and id > 2384772 and id<>'2384772' order by id asc limit 5