?? ?????? ????????????0?
????:1?????????:????????????
2??????????100??
3???????
4???????????
5?????200????
??12??????18???????????? (? ??)????????18??,???,???????17??65???????????,?0.4??
???????,??????????18?,????,??????,??????????????????????,????????????
???????,?????17??6.1?,????,?2.1??
??,18?20?,??,?8??????9????21???????23?????????,???????????1???3??
????????????????,????,19????????20??????,???????????:?2???5???2????????0??????,????????10????????12?,???6???9??(????????) ????:??