A.同步信號(hào) B.色同步信號(hào) C.亮度信號(hào) D.色度信號(hào)
A.20 B.25 C.30 D.35
A.上半場(chǎng)和下半場(chǎng) B.奇數(shù)場(chǎng)和偶數(shù)場(chǎng) C.前半場(chǎng)和后半場(chǎng) D.左半場(chǎng)和右半場(chǎng)