线路纵联保护应优先采用（   ）通道。

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SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69378' and id < 4491449 and id<>'4491449' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69378' and id > 4491449 and id<>'4491449' order by id asc limit 5