对无法直接验电的设备，应间接验电，即通过设备的（   ）及各种遥测、遥信等信号的变化来判断。

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SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69529' and id < 4505004 and id<>'4505004' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69529' and id > 4505004 and id<>'4505004' order by id asc limit 5