塑性是金属的固有属性,它只与金属本身的内部结构有关,与变形的外部条件无关。
查看答案
计算毛坯图是为长轴类锻件选择制坯工步而假设的一种毛坯图。
A. 对
B. 错
预锻工步应根据具体情况决定是否采用。
A. 对
B. 错
It's much ____(easy)for you to use a computer if you know English.
It's very ____(consider)of you to look after my garden during my absence.