?? ???????????????????

????:1?????:?????95?98?
2???????
3?????
4???????
5????????????
2???21????????,?????????(?????????)??????????????????????,??????????,??????????????????
???????????(?????????????????????)??????????????,????“????”,?????????????,????????????????????????????,?????????????????????“???”“??????”????“??????”3??????,???????“1+3+N”?????
???? ????????? ? ???
??????????????:???