?? ????????????:?????????????
????:1???50?????:???????????
2???????
3???????????
4????????????
5??????????????
???????12?????????2??????(???? ?? ??) ??,??????????????“?????????????”???????????????????,???,??????????????
???????????????,??????????????????????,?????????????????,???,????
????80????????,????????????????23?????????????????,??????????????????20%???,???????8000??????????
??????????????,??????,?????????,??,???,????????????????????????????????????,?????,????????
“??,?????????????????,??,???”??????????
??????????,???????????,????,????????,??????????????????????????????????????????????,???,???????????????????? ????????????????????????????????:??????