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