电视广告有别于报纸广告、杂志广告和广播广告的最大特点是（ ）
A．画面清晰
B．形象生动
C．声像合一
D．声音悦耳
参考答案：C
—The light in his office is still on. Do you know _______?
—To prepare for the material(材料) the meeting will need tomorrow, I think.
A．if he works hard
B．why he stays up so late
C．why is he so busy
D．when he will stop working
与传统媒体相比，多媒体主要的特点不包括下面的选项______。
A) 数字化 B) 统一化 C) 实时性 D) 交互性
