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

2?????????

3???????

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

5???????

?1????6???? (???????? ??????????????)??1??????????????????6?????????????,???????????????,???

?6?????,??????

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

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

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

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