?? ??? ?????????????????8????
????:1??????:??100????
2?????????
3?????
4????????????
5?????????????
?????????9???27?? (????????????????????? ???????????)???????????????27????,????????,?8???????,?????????????????
???????,????,???????3??????????,???30????,????85%???25%????????????70%???
??,?????????????????????????,?????,??8??,????????????????????????????????????????????????????????,????????????,?????????????????????????????????????????????????????????????,??????????????????????,???????????
??,????????????????????,??“6??????7????????????8????????”,???90%;????????????????????????????????,?????????????????????????????????????
???????????,?????????,??20%???,??30%???(??) ??????????:???