下列选项中不属于导航卫星（系统）的是(

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SQL Error: select id,body,options from ***_enewstiku where sourceid='31813' and id < 2542633 and id<>'2542633' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='31813' and id > 2542633 and id<>'2542633' order by id asc limit 5