图示对称三相电路中，已知电源线电压为380V.图中电压表内阻可视作无穷大，则此时电压表读数为（   ）。

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SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69035' and id < 4471214 and id<>'4471214' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69035' and id > 4471214 and id<>'4471214' order by id asc limit 5