Paraffins have high diesel indices.链烷烃的柴油指数最高.Objective To explore the biological exposure indices ( BEI ) of dimethylformamide ( DMF ) in China.目的探讨我国二甲基甲酰胺 ( DMF ) 的生物接触限值 ( BEI )....economic indices.经济指数Indices of emp...
These composite indices are derived by standardizing each of its component series.这些综合指数是使通过把它们的组成部分中的各个数列标准化而获得的.Indices of employment , payrolls, and production steadied in February 1931.1931年2月,就业 、 工资额和生产指数稳定.Paraffi...