变压器带负载运行时，若负载功率因数从 0.8 滞后变为 0.8 超前，其电压调整率会（  ）？（0.5）

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SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69421' and id < 4494857 and id<>'4494857' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69421' and id > 4494857 and id<>'4494857' order by id asc limit 5