????:1????????????:????95?

2???????500?4???

3???????????

4???????

5?????????????

??9????????????????30?????????????? (?????? ???????????????)??????30??????????,9????????50%,?0.3??,???????

??????,?????????;????????????????????????????????

??,9?,???????????????50%,??,????????????????????????9??????????,????????????????????50.7%,?0.1??????,????????

9???????????????????,?????3?????????????????,???????;?????????????????????3???????????????????,?60%?????????????????,????????????????,???????????????,???,??????????,??????????????????????

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