改变电压的相位，主要是改变网络中无功功率的分布。(  )

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SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69511' and id < 4503261 and id<>'4503261' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69511' and id > 4503261 and id<>'4503261' order by id asc limit 5