11????????50% ??????????????

????:?????????????:??????

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

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

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

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