????????12???20????? ???????????????,???19??????????,???????????9?????????????8??????????????

  ???19??????,??????????9???????8??? ???

??,?????4?????????????????1???,?????????????,??????????????????????????????19??????????????????,???,????????????3????????,??????????,?????????????????,????????????,?????????????

?????,???????,???,?,??????????,??????????????????,??

?????????????,?????????????,?????????,??????????,???????,????????,???????????????????????????

???????????????,??,???????????,???????????

??????????:???????? “???????”_????

?? ?9?8??????????? ????????

????:1????????:??????vx

2????????

3?????????????

4???????

5???????????

????????12???20????? ???????????????,???19??????????,???????????9?????????????8??????????????

  ???19??????,??????????9???????8??? ???

??,?????4?????????????????1???,?????????????,??????????????????????????????19??????????????????,???,????????????3????????,??????????,?????????????????,????????????,?????????????

?????,???????,???,?,??????????,??????????????????,??

?????????????,?????????????,?????????,??????????,???????,????????,???????????????????????????

???????????????,??,???????????,???????????

??????????:????????