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

2?????????

3???????

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

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

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

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

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

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