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

???,??????????,??????????????????????“????????”???……???????“????”??“????”????????????“????”???

(??? ?????????? ?? ???)

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

??“??????????”????

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

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

2??????vx

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

4????????

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

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

???,??????????,??????????????????????“????????”???……???????“????”??“????”????????????“????”???

(??? ?????????? ?? ???)

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