40Cr钢是最常用的合金调质钢。
参考答案:对
在众多的客户中,选定适合本企业服务的客户,也就是选定目标市场,以集中优势为其提供服务,扩大市场占有率。
Thank you for the wonderful meal, Mrs. Hanson.()
A.Oh, I don't think you ate well.
B.I'm not a good cook in fact.
C.Be careful next time
D.I'm glad you enjoyed it.