论文部分内容阅读
材料学、工艺 (1B)1.偏析的概念是指:a)气孔密集的区域b)任何种类的非金属夹杂物c)析出的合金成份d)沸腾钢钢锭头部区
Materials science and technology (1B) 1. Segregation concept refers to: a) densely populated area b) any kind of non-metallic inclusions c) precipitation of alloy components d) boiling steel ingot head area