?? ???5.2???????? ???????
????:1????????:?????????
2?????
3??????????
4????????
5???????????50
??????????,1??30???10??11????????????(????23.25??,??120.57?????????)?????????5.2??,?????10??
??,???
??????????????,??????????????9?,????????
???????????,???,???????????????????????????,????????,?????
(? ????????????????? ?) ???:??