题目内容

_____ the past three years, he has been attending evening classes to study English.

查看答案
更多问题

He knew it was his carelessness that had caused the accident, but he didn't want to admit ____ it in public.

精益生产体系具有哪些特征?

聪明加工系统(Smart Machine System),具有哪些主要特征?

装备制造业信息化过程,存在哪几个突出问题?

答案查题题库