??????
??????
??????
??????
??????
??????
??????
??????
??????
??????
??????
??????
??????
??????
??????
??????
??????
??????
??????
??????
??????
??????
??????
??????
??
????28????????????????? ????????
????28????????????????? ????????
??
????:
1?????:??????
2???????
3?????
4??????
5?????????
????
6
%
???:??