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

2???????

3??????????

4???????

5??????

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

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

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

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