?? ???6.8????????????????? ???????????
????:1???????????:??????80—100????
2???????????
3???????
4???????
5??????????
??,?????????????6.8???????????,???????????????,?????????
????,???????,????????????????50???,????????????????,???????????????
?????
4????????????????????????350?????????,30???????????2????????????,?????
9???40???????????,???,?30?????????????
????????9??50??,???????????????
?200?;?????????????150????????????????,?????????200?????
(???)
???:?????????