(74) systems perform basic tasks, such as recognizing input from the keyboard, sending output to the display screen, keeping tra

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问题 (74) systems perform basic tasks, such as recognizing input from the keyboard, sending output to the display screen, keeping track of files and(75)on the disk, and controlling peripheral devices such as disk drives and printers.

选项 A、Operation
B、Operator
C、Operating
D、Operate