??

??? ????
?????????????Щ??????????

??

?B? ?3Ρ?B??????????
?E ?400Iu??????
?F ???й

????
??????е????С???????к??á???????31???е??????3???????????????ΧС??????????????Χ??к??????л???????????????????е??????????θ????????Ч?á

??? С()????????????

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

??????????

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

????????????????????????? ???????????Σ???Э?á
1绯?????????????????????????????????????
2?????л?????????;?????????о???????????
??????ɡ??
???κβλ????÷?桢????С???λ???;?÷??С???鷿????,????й?????岥??鼰????ò?
?????(1)??????????Σ??????
(2)????????(??)???????????Ρ????????????
(3)?????о??(??)?????а??? ???о????λ?????...

1.????????????????????? ????????2.θ????????????
3.???????涣??????? ??  Ч? 

??????????Ч??????????.

???Ч???  ???????????B2 B6 ????????????????????????
??????????
1??????????????????????桢??????嵭?
2???????????????????и???з???????
3?????????????????
4??????????????
5???????
6????????
?????????塣 ??
 
~~~~~~~~~~~~~~~~~~~~~~~~~woA ?~~~~~~~~~~~~~~~~~~~~~~

????????

???????15?12??10???6???10??3??3飬ü?600??3η??1~2?

???50?30??70?400н??????????34????


??Ρ?????30???????1??3Σ??20????

????20?15??10?8?15?15??15?30???壩15???壩15??10??10???1硢?????иá
?????????????????????????????ò??
????????к????????????????Ρ????
????????????????磺???к???????Σ????
????????
??50?30??70%?4...