问题：
[单选题] 冯·诺依曼计算机由五大部分组成,运算器是其中之一。它完成的功能包括( )。
A、完成算术运算或逻辑运算
B、完成对打印机的输出
C、完成从键盘的输入
D、完成接受鼠标的信号
参考答案：
A
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