??????
??????
??????
??????
??????
??????
??????
??????
??????
??????
??????
??????
??????
??????
??????
??????
??????
??????
??????
??????
??????
??????
??????
??????
??
????“??????????”???????? 3??
????“??????????”???????? 3??
??
????:
1?????????:92?95?98?????
2?????????
3???????
4?????VX
5?????????????
????
6
%
???:??