单项选择题

What is the author's attitude toward the future of autos

A．Enthusiastic.
B．Pessimistic.
C．Optimistic.
D．Cautious.
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单项选择题
What provides autos with electric power in an automated highway system
A．A rail.
B．An engine.
C．A retractable arm.
D．A computer controller.
单项选择题
A robot can be used to expand our frontiers when ______.
A．its intelligence and cost are beyond question
B．it is able to bear the rough environment
C．it is made as complex as the human brain
D．its architecture is different from that of the present ones
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