题目内容：
计算机指令由两部分组成，它们是（ ）。
A．运算符和运算数 B．操作数和结果
C．操作码和操作数
D．数据和字符
参考答案：
答案解析：
单选题：计算机指令由两部分组成，它们是（ ）。
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B．操作数和结果
C．操作码和操作数
D．数据和字符
B．操作数和结果
C．操作码和操作数
D．数据和字符
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