有一定的无功功率电源的变电站母线可以看作(  )。

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SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69511' and id < 4503215 and id<>'4503215' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69511' and id > 4503215 and id<>'4503215' order by id asc limit 5