单项选择题

The author mentions Samuel Butler and other English writers' tales because______.

A．they teach logic to the readers
B．they show a sense of satire
C．they proved that machines can reproduce themselves
D．they described the imaginary future world of machines
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单项选择题
In the third paragraph, Science today is not laughing at such extremes. suggests that______.
A．science has proved that reproductive monster machines are already existing in the world
B．science has proved that the authors mentioned above tend to go to extremes
C．science has not completely denied the possibility of reproductive powers of machines
D．science is trying to prove the existence of reproductive monsters in the world
单项选择题
The author's conclusion about the subject is that______.
A．human race is likely to be taken over and crushed by a race of robots
B．computers are not yet likely to be made to reproduce similar or more advanced ones
C．the world is faced with the threat coming from monster machines
D．giant computers more intelligent than human brains will .soon be produced
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