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

????????15????,????3????????,???,????????????,3??????,3?????????,???????????????????????????,????????????,?????????????????????,???????????3???????????????

????,????,????,????????????,???????,????????????;??????????????,???????,???????????????????????????????,?????????????(????????????? ???? ???? ?????????????? ??????????? ???? ???)

???:??????

??“??????”????

?? ??????????

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

2????????????

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

4??????

5?????

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

????????15????,????3????????,???,????????????,3??????,3?????????,???????????????????????????,????????????,?????????????????????,???????????3???????????????

????,????,????,????????????,???????,????????????;??????????????,???????,???????????????????????????????,?????????????(????????????? ???? ???? ?????????????? ??????????? ???? ???)

???:??????