中性点不按地系统中单相金属性接地时，其他两相对地电压升高(    )。

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SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69460' and id < 4498505 and id<>'4498505' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69460' and id > 4498505 and id<>'4498505' order by id asc limit 5