单项选择题
A.A002 B.A102 C.A132 D.A407
A.25℃ B.60℃ C.100℃ D.200℃
A.10% B.20% C.30% D.40%
A.5% B.10% C.15% D.20%
A.≤0.14% B.≤0.10% C.≤0.06% D.≤0.03%
A.150-450℃ B.450-850℃ C.850-950℃ D.950-1050℃
A.马氏体 B.铁素体 C.奥氏体 D.奥氏体-铁素体
A.9% B.12% C.15% D.18%