?? ??????919??19???? ??????????
????:1?????????????:??????????
2????????????
3?????????
4???????vx
5?????
?????????????9?20????? (??????????? ????????)???????????????????20??????????
??????????:??????919??????????19??19???,??????????,???????????
??:???????????????919???????????????,????????????????????????????????????,??????
????,??,????????,?????????(?) ???????????:???