???????????????????????????2????14????????? ?,???????????,?????????????????????????,??????,??????????????????????????,??,?????????????“????????”???????????,??????????????????????????????????????????

???????:???? “???????”????

?? ????????:???,????“?????????”

????:1????????:??????????

2??????????

3???????vx

4????????

5???????

???????????????????????????2????14????????? ?,???????????,?????????????????????????,??????,??????????????????????????,??,?????????????“????????”???????????,??????????????????????????????????????????

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