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

2???????

3??????????

4???????4?????

5????????????

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

??????????????????,????????????,????????,?????

?,???????,???????????,?????????????????????????????????????????????????????????????????,??????????????????????????,???????????60?????????,?????

???,??;????????,????????;???,?????????90%?

????,“?????”??????????????,???????????????,60???34%,?????????????????????????????????

????,?????????????????,????,?????????????????6????????,???????50%?????,???“?????”????????,????

?????????????,2??5??????????,??????????????????????????????????????????????????????24%? ??????????:???????????