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

2??????????

3??????

4?????vx

5?????????

?2????????????????????????????????????7??? ?7????,????????????,???????????????????????????1?,???????????294??????????????????????

?:???????

??,???,????294?????????????,???12???8????

?????,?????1???????,?????????

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

??????????6???,?????????????????,????????????????????????????,?????????????2???????????????????????7??????,“????,???????”

“?”,????????????????,????????????????

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

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