题目内容

What’s Jonah’s Christmas wish? Why did Jonah call the radio station?

查看答案
更多问题

How did the hostess of the radio persuade Jonah to ask his father to talk on the phone?

普通、优质、高级优质钢是按钢的()进行划分的。

A. 力学性能的高低
B. S,P含量的多少
C. Mn,Si含量的多少

选择制造下列零件的材料。冷冲压件()

A. 08F
B. T70
C. 45

选择制造下列零件的材料。坦克履带()

A. GCr15
B. 40Cr
C. ZGMn13-3
D. 20CrMnTi

答案查题题库