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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The connection between two networks to form an internet is handled by a machine known as a ______.
A. bridge
B. client
C. router
D. switch
单项选择题
（36）是（）

A.advantages
B.resources
C.benefits
D.precedents
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