题目内容：
微机硬件系统中最核心的部件是（ ）。
A．内存储器 B．输入输出设备
C．CPU
D．硬盘
参考答案：
答案解析：
单选题：微机硬件系统中最核心的部件是（ ）。
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B．输入输出设备
C．CPU
D．硬盘
B．输入输出设备
C．CPU
D．硬盘
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