Programs such as word processors and spreadsheets are known as utilities.
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Running File History improves system performance.
A. 对
B. 错
On a disk, a track is a concentric ring, and each track is divided into wedge-shaped sections called sectors.
A. 对
B. 错
There are several ways in which you can "catch" a computer virus.
A. 对
B. 错
Utility suites come with one program only.
A. 对
B. 错
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