?? ????????17??????????? ??????????
????:1??????????:????????
2?????????????
3???????????
4???????vx
5?????????
11????23???,?????,??????????
??????????????,??????????????,??????????????????????,?????????????????????????????,?????????????????????????????????,????????????,?,???????,????????????????
????,??,?????????,??????????????17?,????
?????????????????17??????????????,???????271????????????????250???88??????,????609?????????????????,???????,?????????????,??????
(???????????????? ?????? ????????)
????:??????????????