为了提高简单对比态原理的计算精度，提出了三参数对比态原理，所提出的第三参数有两种，它们是偏心因子和压缩因子。

A.偏心因子

B.压缩因子

C.临界压缩因子

D.对比温度

A.对比参数

B.临界参数

C.偏心因子

D.压缩因子

ion shows that the compression factors of corresponding states of various substances are equal. According to the comparison parameters, the compression factor Z can be obtained by means of diagram or calculation.

A.Z =f (Tr , pr , Zr)

B.Z =f (T , p , Z)

C.Z =f (Tr , pr ,ω)

D.Z =f (T , p ,ω)