?? ???????5.7?????? ???
????:1???????:??????????
2??????????
3??????
4???????????
5??????????
?12???4?????????????? (????????? ?????????????)?,??4????????5.7??,?????????????????????
???????????????,??????????????2?54????,??18.52??????,??120.74?,????????4?????,?23????????????????????????????????????????
???,????????????,????????
??,??,????????????
??????,??????????????????(???????) ??:????