A. Well,I’ve enjoyed meeting and talking with you. B. I am sorry,I really have to go. C. Well,I’d like to hear more about it,but I really have to go.I’ll call you. D. I’m sorry.I’ve got to go. E. Well,talk to you later,then.
A. 正确 B. 错误
A. 价值形态 B. 收入形态 C. 产品形态 D. 支出形态
A. 维护项目 B. 质量标准 C. 维护周期 D. 故障处理时限