.操作过电压的特点是其振荡频率(    )。

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SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69522' and id < 4504123 and id<>'4504123' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69522' and id > 4504123 and id<>'4504123' order by id asc limit 5