????:1?????????:??????????

2?????

3?????????

4????????

5?????95?????

??????????????6??????????????????20??????????????????????? (?)????????20??????,???

????????????,???????“???????????????????????:????????????????”????????????????????????????,??,???????,????????????????

20?????????????????????,??????? ?????????

?,“????”,??,????,???,??,?????????,??????????,????????????????????,?????,80%????????????????,?20%???,??????????????????

?????,??:??????????,????????;?????????????,??????;?????????,?????????,??????;??????;???(???????????????)

????????:??????????