【简答题】计划工作具有秩序性,最主要的秩序性表现为计划工作的 ________ 和 ________ 。
【单选题】Background music may seem harmless, but it can have a powerful effect on those who hear it. Recorded background music first found its way into factories, shops and restaurants in the US. But it is soo...
A.
help to create a soothing atmosphere
B.
decrease production in factories
C.
promote sales in all places
D.
help to have more meals
【单选题】在Windows7中,在文件夹中选择多个不相邻文件时再单击鼠标的同时,应该按下( )键盘。
【单选题】1889年,法国人( )研制出齿轮变速器和差速器。