能使车辆倒行,是靠()实现的。
A.主减速器
B.传动轴
C.变速器
D.差速器
参考答案:C
The students had much fun soccer after school.
A. playing B. to play C. played
用鼠标拖动方式复制文件或文件夹时,在选定对象上()并将其拖动到目标文件夹上。
A.按鼠标左键和CTRL键
B.按鼠标右键和CTRL键
C.按鼠标左键和ALT键
D.按鼠标右键和ALT键