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【单选题】
CPU主要由寄存器组、运算器和控制器等部分组成，其中控制器的基本功能是（）A.
进行算术运算和逻辑运算
B.
存储各种数据和信息
C.
保持各种控制状态
D.
指挥和控制各个部件协调一致地工作
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A.
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A.
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B.
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A.
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B.
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