当系统发生故障时，最快速度切除故障，是继电保护的（   ）体现。

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SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69375' and id < 4491118 and id<>'4491118' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69375' and id > 4491118 and id<>'4491118' order by id asc limit 5