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

2????

3????????

4????????vx

5?????????

??????????11??26????????????????????(??????)????????26???????????????????,?????????????????,?,????????????????????????

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

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

??,????????12??????15??????????????????????????????,??????????????????,??????,??

???????????????,???,???????????,???(???????????) ??????????:???