????????????????????????С????ζ??????????????????????????????????θ??????????????С????????????????С?????????????????????????????????????????????????????????????????????鷽??
?ο??????С????????????2??1????????????????????????????2~3?Ρ?
?????????????С??50?????ζ??10???????????С??30???????30?????????10?????壬????????
???????С??50????????У????????10??????????????????????????????????С????????????Ч??
?θ?к??С?????????з????????????????????3~5?????????飩????????????15~30??????????????2~3?Ρ?
???????????С??30???????30??????10?????1??????????
????????Σ????С??30??????30?????1??????????
???????С??30~60????????????????2~3?η???????????????????
??????С??50?????????20????????25?????????
?θ????????30??????????????20???????????????á??????15????300?????????????????2????