锻前加热的目的是为了提高金属材料的塑性，降低金属材料变形抗力，有利于金属流动成形并获得良好的锻后组织
参考答案：对
— I’ll tell Mary about her new job tomorrow.
— You ______ her last week.
A．ought to tell
B．would have told
C．must tell
D．should have told
模板按材料组成分为哪几种？
