?? ?????????????
????:1?????:?????
2??????
3?????
4????????vx
5?????????
??1?4????? (? ?????)??????????????????4??????????????
1??????4???????????,?????????????????????????????????????? ??? ? ?????????????????,??,????,?,??????????????????????,??,?????,????????????,????“??”????,???????????????????????,???????????,??????????,????????“??”???“???”,?????????,????????
??????,????????“??”???????????“?”??????????,????,????,????????(????????)
????????????????:???????