单项选择题

The assumption of the future is not all hot air because

A．Marconi made a profound change in the past.
B．the wireless technology will change everything.
C．the possibility of wireless technology is justified.
D．the wireless technology is already sophisticated.

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单项选择题

Wireless technology is introduced as

A．an important fruit in daily life.
B．a supplement to cable communications.
C．the opening of a new uncabled era.
D．a new type of monopoly.

单项选择题

According to the passage, the Wi-Fi standard

A．is based on the conventional wisdom.
B．adopted an unlicensed part of the spectrum.
C．relies on the standards by the giant corporations.
D．is created solely by some geeks.