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

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

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

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

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

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