电力系统电压的单位常采用（    ）

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SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69458' and id < 4498229 and id<>'4498229' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69458' and id > 4498229 and id<>'4498229' order by id asc limit 5