模拟电视
参考答案：用模拟信号传输。数字电视：指亮度、色彩、信号、声音的参数变化用二进制数表示。
下列除哪项外，均属“五液”内容（）
A.尿
B.涎
C.涕
D.泪
E.唾
They were_______ busy_______ with each other__________ the time. [ ]
A. too; to talk; to forget
B. too; talking; to forget
C. so; to talk; that they forgot
D. so; talking; that they forgot
