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

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

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

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

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

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