??????
??????
??????
??????
??????
??????
??????
??????
??????
???????
??????
??????
??????
??????
??????
??????
??????
??????
??????
??????
??????
??????
??????
??????
??
?????:???????“????”???????
?????:???????“????”???????
??
????:
1???????SN????:??????????
2?????????
3?????????????
4?????????
5???????????
????
6
%
???:???