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

2?????????

3????????

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

5???????

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

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

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

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

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