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

2??????????

3??????v

4?????

5??????vx

???????2??????????7???????????? (?????????)??????6?,?????????????????

?????????????G7???????????,????????????“??”??????????????,???,???????????????????????,??????????????????

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

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

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

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

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

????:?????