?? ??????? ????????2.2???????
????:1????????:?????
2??????????
3?????????????
4???????
5?????????
??1???7???? (? ??? ????????)?7????????????????,???????????????????????????6.8????????,????????????????????????????????2.2???????????????
????????????????????,1???7????9??5???????????????,?????????????(?????28.50?????????????????????,?87.45?)???????????6.8??,?????????10?????,????????????????
???,??????????????????,?????????????????????????????,?????????????
??1500????????????
????,??,????????????????????????????????????????????2.2??,????,??????????(????????????????????) ??????????:????????????