单项选择题

A local area network (LAN) is the communication of a number of computers by (68) connecting to each one in a single location, usually a single floor of a building or all the computers in a small company.

A．line
B．cable
C．copper
D．copper cash
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单项选择题
A．referentB．referenceC．referanceD．refering
A．referent
B．reference
C．referance
D．refering
单项选择题
A．userB．guestC．administratorD．owner
A．user
B．guest
C．administrator
D．owner
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