变压器带纯电阻负载运行时，变压器输入功率的性质为（   ）

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SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69399' and id < 4492841 and id<>'4492841' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69399' and id > 4492841 and id<>'4492841' order by id asc limit 5