将亮度信号延迟0.6μs是为了（）
A.使图像更明亮
B.避免彩色镶边
C.避免色、亮信号相互干扰
参考答案：B
Do you know _____ over there? [ ]
A. what happens
B. what was happened
C. what is happening
D. what did happen
初级代谢
