????:1???95??:????????

2???sn??

3??????

4???????????

5??????????

?8?6?????? ??????????????????,????????8????????6????????????,7???29???????????8??4??????????,?1.2?,??????21??????

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

??,????????,??1.2????

????????,???,65?????????60%??,?????,???1008??????

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

???:??