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

2??????

3?????????

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

5?????????

????2???????8?????? ?:????????????????????7??????,?????????????,???“????????”???

????«????»7???????????????,???????,???????????????,????

????????,???,????????????????????????????20%?????(?????50%??)?????????,????,????

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

??????7???,?????????????????,???????14????16?????????????(???????????????????????????) ????????:??????????????