下列哪种通道是持续开放的（      ）

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SQL Error: select id,body,options from ***_enewstiku where sourceid='25933' and id < 2179304 and id<>'2179304' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='25933' and id > 2179304 and id<>'2179304' order by id asc limit 5