???????????????????,?????????????????,?????????????????

110????????4210?﹥+7J????1350=5560?﹥

1860????+7J????900=2760????

?????????????37?﹥+16????

??η?????????(?????????????????????400)??55.6?﹥+27.6????

????????????400???=1.5?????????(????????????Щ???)=470X1.5?????700W

??????????????2????????10.20.40.80???飬??????????????????????????????????????飬???????輸?????70%.20%.9%.1%??????????2?????????????????????

0.7X10+0.2X20+0.09X40+0.01X80=15.4???飬???????????700W/400?????1.75W

???????2?????????????15.4X1.75=27W????????ξ???????27W!

????????2?????????????????ε?????????!

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