单项选择题

From the third paragraph, we can know that ______.

A．there has not been a true humanlike robot yet
B．computers in the robots are expensive
C．robots may do what they are told
D．robots have been designed to work independently

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单项选择题

Which of the following conclusions is best supported by the second paragraph

A．Robot does not last long.
B．The early men made toys themselves.
C．Man has always had a desire to make a copy of him self.
D．The materials for making a copy of man are limited.

单项选择题

The passage is a piece of ______.

A．description
B．narration
C．argumentation
D．disposition