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

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

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

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

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

????:?????