?Χ??轵?????顣а?1000??????
Щ?У??????????λ???????嵽???????????μ??
???????2?????????????????
?±??23??λ?????????м???????????1?
????????????Σ?????????????????Ь????Щ??ò????Σ?????????С??
????????????μ??弫?????????￡??ó????????
???????л?????????С?С?????м?
?????п?????????????м???????????
?????????????ι?????????Щ?κ??????
α??)
?
