题目

下列有关信息和信息处理的说法，正确的是（ ） A . 计算机中的信息是以十六进制形式存储的 B . 声音、图像必须经过数字化后才有价值 C . 文字、声音、图像等既是载体，也是信息的表达技术 D . 算术运算和逻辑运算是计算机处理信息的基本运算 答案：D一Where is Jason? I want to tell him about the result of the singing competition.一Oh, you . He has known it already.A. can't B. mustn't C. needn't D. shouldn't