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

????:??????:????600??

??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%??

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