-
Methods: Seek interrelation between dust dose and morbidity level with the method of life table.
方法：应用寿命表法求得接尘剂量与发病水平的关系。
youdao
-
The lower the cultural level is, the higher of morbidity.
文化程度越低，患病率越高。
youdao
-
The lower the cultural level is, the higher of morbidity.
文化程度越低，患病率越高。
youdao