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

2???????

3???????4?????

4????????????

5?????

??????????????11????22???? (????????? ?????)?????,?????????,????????22???,????????????????????

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

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

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

??????????,???????????????????,????????????,???????????????????“???,????”(????????????????) ???:???