下列旅游服务中，居于主导地位的是(　)。

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SQL Error: select id,body,options from ***_enewstiku_ where sourceid='50925' and id < 3256123 and id<>'3256123' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='50925' and id > 3256123 and id<>'3256123' order by id asc limit 5