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

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

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

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

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

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