??????
??????
??????
??????
??????
??????
??????
??????
??????
??????
??????
??????
??????
??????
??????
??????
??????
??????
??????
??????
??????
??????
??????
??????
??
???????????????:??
???????????????:??
??
????:
1????????vx:??????
2?????
3?????wx????
4??????100?????
5?????????????
????
6
%
???:??