钢的奥氏体化过程可分为三个阶段，即奥氏体晶核的形成和长大、残余渗碳体和奥氏体______。
参考答案：溶解 均匀化
某钢厂用纯氧顶吹炼钢，用去56立方米氧气（标准状况下）相当于（ ）mol氧气
A．2500
B．5000
C．4000
D．2.5
— Football by the British at the beginning of last century.
— That's probably why football is one of popular games in England. [ ]
A. was invented, the most
B. invented, more
C. was invented, more
D. invented, the most
