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单项选择题
The following figure is the schematic of effectof heating temperature on microstructure and properties of cold-deformedmetals, which curve shows the change of grain size?
The following figure is the schematic of effectof heating temperature on microstructure and properties of cold-deformedmetals, which curve shows the change of grain size?
A.
A曲线 B.
B曲线 C.
C曲线 D.
D曲线
