????????????????????? ??????????? ????????????????

?????1??2W?????????2W?????????????????

??3??1???????2W???????6W

????2??

???6W???????0.75??6/0.75=8

???????8W??1??????????????2??

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???3??6W

????3??6W

???12W??100%????????????

????

2????3??

??????2???????????8W

3?????24W???????0.75??24/0.75=32

?????????3???????????????32W???

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???24W??????8????16W

???40W

????4????

??????3??????????????32W

????????4????????32X3/0.75=128W

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32*3=96W???????15??=30W

????126W

?????????????????

???4?????????÷????????

???????????????????????????????

?????????????????????????????????????

????????????????4?????

?????????????????????汦??????

???????????????????????1??2W???

??????????????1???????

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?????????????????????!

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?????????????????????

5????126X3(3????????)+30X2(???????)=378+60=438W

6????438X3+60X2=1434

7????1434X3+100X2=4502

8????4502X3+150X2=13806

9????13806X3+250X2=41918

10????41918X3+450X2=126654

?????????????????????????10???????????12.67??!

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