????:?????
“????sn”????
??????
??????
??????
??????
??????
??????
??????
??????
??????
??????
??????
??????
??????
??????
??????
??????
??????
??????
??????
??????
??????
??????
??????
??????
??
????“???????????” ??“??????”
????“???????????” ??“??????”
??
????:
1?????sn:???????
2??????95?
3?????
4???????
5????????
????:?????
????
6
%
???:??