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

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

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

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

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

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