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