??????
??????
??????
??????
??????
??????
??????
??????
??????
??????
??????
??????
??????
??????
??????
??????
??????
??????
??????
??????
??????
??????
??????
??????
??
???????????????????40????????????????????????
???????????????????40????????????????????????
??
????:
1???????:500?3???????
2??????
3????????????
4?????95?
5????????????
????
6
%
???:??