电网负荷 220 兆瓦以上的县级市电网减供负荷 60%以上应被判定为较大事故 。 (       )

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SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69634' and id < 4513724 and id<>'4513724' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69634' and id > 4513724 and id<>'4513724' order by id asc limit 5