单项选择题

With a navigation computer, a driver will easily find the best route to his destination _______.

A．by inputting the exact address.
B．by indicating the location of his car.
C．by checking his computer database.
D．by giving vocal orders to the computer.
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单项选择题
The navigation computer functions ______.
A．by means of a direction finder and a speed detector.
B．basically on satellite signals and map database.
C．mainly through the reception of turn-by-turn directions.
D．by using a screen to display satellite signals.
单项选择题
The navigation systems in cars like Lexus, BMW and Audi are mentioned to show ______.
A．the immaturity of the new technology.
B．the superiority of the global positioning system.
C．the cause of price fluctuations in car equipment.
D．the different ways of providing guidance to the driver.
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