以下一般属于电力系统大扰动的是：(    )。

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SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69461' and id < 4498404 and id<>'4498404' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69461' and id > 4498404 and id<>'4498404' order by id asc limit 5