????,????????????????????????????????????,????????????????????12?????????????11??????????????????,?,?????????,??????????

?????????,??????????????,12????????????????,?????,????(???????? ??)

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

??“???????????”????

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

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

2????????

3???????????

4???????SN????

5?????v

????,????????????????????????????????????,????????????????????12?????????????11??????????????????,?,?????????,??????????

?????????,??????????????,12????????????????,?????,????(???????? ??)

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