????????????????,???11?23??,????????????????????????????????????,??????“??”,????????????????,?,??????????????????,????,???????????????,???????????,??????????????????,????,??,??????????????(???? ????????????)

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

??“???????????”????

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

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

2??????????

3?????

4?????????

5?????????

????????????????,???11?23??,????????????????????????????????????,??????“??”,????????????????,?,??????????????????,????,???????????????,???????????,??????????????????,????,??,??????????????(???? ????????????)

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