??????
??????
??????
??????
??????
??????
??????
???????
??????
??????
??????
??????
??????
??????
??????
??????
??????
??????
??????
??????
??????
??????
??????
??????
??
??????:????????? ??????????20%
??????:????????? ??????????20%
??
????:
1????????:??????????
2????????????
3???????
4??????????
5???????????
????
6
%
???:??