Back pains can be the result of bad _______.
A. post
B. posture
C. gesture
D. position
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Soon Peter arrived, white with fear, for he thought his ________ had come .
A. deem
B. doom
C. boom
D. blossom
Thousands of men and women have been preparing to _______ the world with their crisp steps and unified action on Oct 1.
A. flip
B. hoist
C. grin
D. dazzle
使用特定的颜色值(颜色键控或者色度键控)和亮度值(亮度键控)来定义视频素材中的透明区域,当断开颜色值时,颜色值或亮度值相同的所有像素将变为透明。
A. 灰度系数校正
B. 更改颜色
C. 键控
D. 分色
节目监视器的模式用于检测亮度信号时非常有用,它使用IRE标准单位进行检测。水平方向轴表示视频图像,垂直方向轴则检测亮度。