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35w一个月用25.2度电左右。35w/h一小时耗电为0.035度电左右,电功率为0.035kw,1度=1kw/h,即W=Pt,P=0.035kw;W=Pt=0.035kw×1h=0.035kw/h。所以35w一个月用0.035x24x30...