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

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

???????????????????????????????????????????1??-??????10?????????????????????????????????????????????????????úe?????????????????????????????????????????“????????”????????????????????淨(jìng)??????????????????????

????????????????????????????????????????????????弶??????????????????????λ????????1?????????????60????70????80????2?????????????????????????????????????????????????????￡?

60???弶????——????3???????1???????????1??????????(????1500??);

70???弶????——????3000???????2???????1????????(????500??);

80???弶????——????1?????????2000???????2????????(????150??);

2??弶????——1??????????1????Ч???????3????????(????50??)??

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