【单选题】'It is a distinct group and not a transitory class between the white and blue' means graycollar workers will be a ______ group of professions.
B.
short-term and changeable
【单选题】图层上的图形仍然处于图形中,并参加运算,但不在屏幕上显示,则该图层被( )
【简答题】在视频中添加______,能增加视频的完整性,使内容更丰富更具观赏性。
【简答题】暂时收入(transitory income)
【简答题】transitory A. constant B. perpetual C. tr ansient D. perplex