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 himself.
D．The materials for making a copy of man are limited.
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单项选择题
In order to enable the intelligent robot to deal with an unexpected situation, the computers in it must do the following things except______.
A．having a large amount of information
B．making choices about how to act
C．studying the situation carefully
D．finding the information quickly
单项选择题
According to the author,______.
A．older adults need more physical exercises than the younger ones
B．younger adults are not necessary to take a physical examination before a fitness program
C．fitness programs for older adults should be well -monitored
D．poorly - designed fitness programs for older adults will do serious harms to them
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