单项选择题

In an automated highway system, all the driver needs to do is ______

A．keep in the right lane
B．wait to arrive at his destination
C．keep in constant touch with the computer center
D．inform the system of his destination by phone

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热门试题

单项选择题

One significant improvement in the future car will probably be ______

A．its power source
B．its driving system
C．its monitoring system
D．its seating capacity

单项选择题

What is the author's main concern

A．How to render automobiles pollution- free.
B．How to make smaller and safer automobiles.
C．How to solve the problem of traffic jams.
D．How to develop an automated subway system.