????:1?????????????:????sn????

2?????

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

4?????????

5?????????

?????????9??????5?????,??????????????????????(????????????“????”)????????????,??,????

????????????????????,????,?????????,????????“????????????????”?????????????????????,????“????????”??,?,??????????9??28???,?????????????,???,???

??,?????????????12???????1.35???????????????,??31.31?????208???????157?????,???

(?????????? ??????????????????? ? ???? ?????????? ?)

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