???????8?′??濨??????????????????
???????????????
???????(????????????)???????濨????????????????????1???(????????μ??????????????????????)??
????????????????濨?????????80%?????????λ?????100%?д??濨??
?????????а???12??(3800+??)??????????2(5200-5499??)???????????100%?д??濨??
12??????????????“?????????”??????????????!