??????20????????????

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

??????8?????????????????31?????? (????? ????????????)?????????????????8????31??????????????????????,8????50.3%,??20????????50%??????????????????????,????

??,?,?????0.6??????????????????????0.1??;??????????????????????????????????????????????,??0.3??????????????????????2??????????????

????,8???????????????,?????????????50.3%,????20??????????????50%?????????????????,???????????50%?????,??

???,????8???????????????????,??50.2%,??????0.2?????,?????????????????,??????????,????????????????

?,??,????????????????????55%??;???????????,???????????????????,?????60%???

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