??????
??????
??????
??????
??????
??????
??????
??????
??????
??????
??????
??????
??????
??????
??????
??????
??????
??????
?????????
????????
??????
??????
??????
??????
??
?????????,??N???“?????”?
?????????,??N???“?????”?
??
????:
1?????????:??92?95?
2?????????
3???????????
4????????
5????????
????
6
%
???:??