【判断题】Black Friday is the day after Thanksgiving.
【多选题】经过表面处理,表面硬度较高的渗碳淬火、薄片类的零件可以采用哪几种硬度测量标尺?
【单选题】It isn't quite ______ whether the teacher will collect the homework by Friday, so you needn't hurry. [ ]
【单选题】A: _____ you go to the movies on Friday? B: I can't . I have to work on Friday.
【单选题】老年人夜寐早醒而无虚烦之证的,多属气血不足,治宜