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[单选题]
保持微型计算机正常运行必不可少的输入/输出设备是______。
A
A、键盘和鼠标B、显示器和打印机C、键盘和显示器D、鼠标和扫描仪
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试题答案：
C
答案解释：
键盘作为一种输入设备是最基本和不可缺少的，显示器作为一种输出设备也是不可缺少的。而鼠标和打印机则是对输入、输出设备的扩充。
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