单项选择题

（） means that every project has a definite beginning and a definite end.

A. Project phase
B. Unique
C. Temporary
D. Closure

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单项选择题

Adding 5 people to a 4 person team increases the communication channels by a factor of （）.

A．3 times
B．4 times
C．5 times
D．6 times

单项选择题

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

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