单项选择题

According to the passage, humans ______.

A．can control the robots by program
B．can work a day in unpleasant surroundings
C．has a mechanical arm and a metal hand
D．didn't have a head
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单项选择题
The best title for this passage is ______.
A．Humans
B．Robots
C．Computer
D．Metal Hand
单项选择题
What can robots do in unpleasant surroundings
A．They can take the lunch breaks.
B．They can have the vocation.
C．They can work 24 hours a day.
D．They can go on strike.
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