问题
单项选择题
(71) provides a data path between the CPU and external devices.
A. Keyboard
B. I/O port
C. Disk
D. Scanners
答案
参考答案：B
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(71) provides a data path between the CPU and external devices.
A. Keyboard
B. I/O port
C. Disk
D. Scanners
参考答案：B