??????
??????
??????
??????
??????
??????
??????
??????
??????
??????
??????
??????
??????
??????
??????
??????
??????
??????
??????
??????
??????
??????
??????
??????
??
????|??????? ????????????
????|??????? ????????????
??
????:
1???????:??????????
2???????
3????????
4??????
5???sn??
????
6
%
???:??