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

2???????????

3?????????

4?????????

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

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

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

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

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