问题
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
答案
参考答案：C
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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
参考答案：C