Stainless steels are divided into three classes on the basis of the predominant phase constituent of the microstructure:（）,（）, or（）

Stainless steels are divided into three classes on the basis of the predominant phase constituent of the microstructure:（）,（）, or（）
A.Martensitic
B.Ferritic
C.Pearlite
D.Austenitic
正确答案：Martensitic；Ferritic；Austenitic