_______ 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