/(0.00) =数据太大了,超出范围
/(163.84) =0.006103515625
/(327.68) =0.0030517578125
/(491.52) =0.00203450520833333
/(655.36) =0.00152587890625
/(819.20) =0.001220703125
/(983.04) =0.00101725260416667
/(1146.88) =0.000871930803571428
/(1310.72) =0.000762939453125
/(1474.56) =0.000678168402777778