Type-BCOCA¹⁴⁷⁰²²BNC¹⁴⁴⁶⁶⁴⁺³ 基本例句 乙型¹⁰⁰ Methods4 types of curve-model such as Inverse function model, Power function model, Logarithmic function model and S- function model were used to fit the trend of Type-B encephalitis incidence rate. 方法采用倒数函数、幂函数、对数函数、 S型函数四个曲线函数拟合乙脑发病率,经比较选择倒数函数为较优拟合模型。 chemyq