45钢的含碳量是A.0.045%B.0.45%C.4.5%D.45%
45钢的含碳量是
A.0.045%
B.0.45%
C.4.5%
D.45%
参考答案和解析
C
相关考题:
判断题#45钢的含碳量比#65钢的含碳量高。A对B错
45钢的含碳量是
A.0.045%
B.0.45%
C.4.5%
D.45%