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