?? ??????20????????????
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????:1???????:??51??
2????????????
3?????
4????????????
5???????????
??????????????????????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%???
????????,??,???,??????,????????????????????,??????(????) ????????????????????:??????