10kV不接地系统，母线的线电压：为10∠0°kV,为10∠-120°kV,为10∠120°kV,则相电压为（   ）。

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SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69397' and id < 4492371 and id<>'4492371' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69397' and id > 4492371 and id<>'4492371' order by id asc limit 5