???????????????

2??10??????????,???,?????????????????????????(?????????)?,8???????????????????????????????,??????????,????????,????

???,?,?????????3????????,????????????700?????????????????????????????????????????????????????????????,????98.2%?

???(???????)??????8??????????,???70?52????????????????,???????????20?????

???,?????2???20????????1????15???,?????500?,??????????(???? ?????????)

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