三相不对称负载星接有中线，接于对称三相四线制电源上，则负载相电压（   ）。

试卷相关题目

SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69035' and id < 4471216 and id<>'4471216' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69035' and id > 4471216 and id<>'4471216' order by id asc limit 5