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

????:?????v:?????

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

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

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

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