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

???????????????????,??????????????,?????????????

??????????°汾???????????????????????????????ú???????????????????????????μ?????????????????????

1.???????????????????????????????????????

2.????????μ???????50????????80???????????10??????????4?????????????45????????70????????????弶????????6????????

3.???????????????μ????????????????????????????????????8400??????

*45??????????200????

*50??????????400????

*55??????涴??600????

*60???????????800????

*65??????????1000????

*70?????????1200????