                           

                           ϵ
           ----------------------------------------------
                                       1.0
           ----------------------------------------------
            ʯʽϰ¹       1.1
           ----------------------------------------------  
            洦                         1.2
           ----------------------------------------------
            Сͼ·                             1.3 
           ----------------------------------------------
           ע⣺ݼ淶P44,涨Ʋ
                 ȡֵΧΪ[1,1.3]
