主减速器的功能是升速降矩。
参考答案:错
_______ and guilty, Maggie put the book on the shelf she had secretly placed in her schoolbag.
A.Frightened
B.Frightening
C.Being frightened
D.To be frightening
显示器的( )指标越高,显示的图像越清晰
A.对比度
B.亮度
C.对比度和亮度
D.分辨率