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

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

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

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

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

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