????:1????????????:dbj?????

2?????????

3?????????

4????????

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

???11????30?????? (?????????? ???????)?30???????,11???50%,???????????????0.2????,??6?????50%????????,???

????????,??????????????,?????0.3?????0.9??;????????????????;???????????????????????????????????????????????????

?????,11???????????????,?????????????50%,?????????????????????????????????????,??,?????????????????????????60%??????????????????????,???????????;????????????????52%??????,???????????;?????55%?????,???????,????????????????

??,?????????????????,??,???,?????????????????????????,???11???????????????,????,???????????????(????) ?????:??????