单项选择题

A．He is in the office.
B．He is out.
C．He is at the theatr
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单项选择题
The word carbon (Line 5, Par
A．2) Stands for ______.A. intelligent robotsB. a chemical elementC. an organic substanceD. human beings
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 completes as the human brain
D．its architecture is different from that of the present ones
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