通常将钢的奥氏体化过程分为形核、核长大、（）、成份均匀化四个阶段。
A、剩余渗碳体溶解
B、剩余渗碳体形成
C、晶界形成
D、铁素体溶解
参考答案：A
Peter received a letter just now ______ his grandma would come to see him soon. [ ]
A. said
B. says
C. saying
D. to say
将采，企业的行业发展和行业自律应主要由主管部门管理。 ( )
