单项选择题

Why is it possible to send large amounts of information at great speed

A．The invention of glass-fiber technology.
B．Economic links among nations.
C．The popularity of home computers.
D．The appearance of the cable television.

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热门试题

单项选择题

Which of the following can best serve as the title of the passage

A．Communications.
B．Computers.
C．Telecommunications.
D．Glass-fiber Technology.

单项选择题

What led to the idea of forming the Red Cross

A．War.
B．Providing services.
C．Natural disasters.
D．Providing blood.