????12??6?? 12?????6??,???

????:????????“????????”??????????

???:???????????“??”????,??????????????“??”??????????,???????????“??????????”???,????“????”?“??????”???

?,“????”???????“?????”?????,??,??;?,?????“??”??;??“?????????????”,?????????????????????????“????”????,????????????

?,????????,???“????????”???????????,“????????????????”“????”?????????,????????????“??????????”?,???????“?????????”??,??? ???:???????????????? ??“??????????”????

?? ????:???,“????”“????”???????

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

2??????vx

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

4????????

5???????

????12??6?? 12?????6??,???

????:????????“????????”??????????

???:???????????“??”????,??????????????“??”??????????,???????????“??????????”???,????“????”?“??????”???

?,“????”???????“?????”?????,??,??;?,?????“??”??;??“?????????????”,?????????????????????????“????”????,????????????

?,????????,???“????????”???????????,“????????????????”“????”?????????,????????????“??????????”?,???????“?????????”??,??? ???:????????????????