视频信号采样格式是指（）、（）、（）三种信号采样速率的比率。
A.R、G、B
B.Y、U、V
C.A、G、C
D.P、A、L
参考答案：B
根据对话语境和首字母提示完成对话
( Sunday at home)
A: Oh,it's time for lunch. I'm hungry.
B: So am I. S 1 we go to the cafeteria(自助餐厅)?
A: I don't like standing in line,you know.
B: What would you s 2 ?
A: What a 3 the hamburger stand around the corner?
B: That's a good i 4 .Can we get anything to drink there?
A: It 5 so. Coke or something else.B:Excellent.
（）时期有粉黛、眉墨兰膏等化妆品。
A.春秋战国
B.唐朝
C.宋朝
D.明朝
