????:1???????:????SN????

2?????????????

3???????

4???????

5???????

????????8???27?? ???,??????27??????,?????????????????-??,???????26?????????????????????????????

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

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

????,?????26????????????????????,??????????????????????????????

???23??,???????-????????????????????,?????????3?????,8??????????,?????????????26????????,????(??) ???????:?????????