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

????:????200????:??????????

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

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

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

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