单项选择题

Which of the following is not part of the quality assurance process （ ）

A．Operational definitions
B．Quality policy
C．Quality audits
D．Quality improvement
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单项选择题
The （ ） has several major components, including the system kernel, a memory management system, the file system manager, device drivers, and the system libraries.
A．application
B．information system
C．operating system
D．iterative
单项选择题
Which of the following elements can be called the key element of a computer （ ）
A．printer
B．CPU
C．mouse
D．keyboard
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