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
According to the passage, why has human intelligence not been copied in the making of a robot
A．Computers can only do mathematical problems better than human beings.
B．Technology is not advanced enough to copy how hu man minds work.
C．Scientists are Satisfied to have the robot with senses of sight and touch.
D．Robots with human intelligence will be dangerous to human beings.
单项选择题
According to the passage, all of the following are advisable to older adults for a fitness program except ______.
A．wearing appropriate clothing and shoes
B．being mentally ready for physical exercises
C．including periods of warm-up and cool-down
D．avoiding any pressure to their hearts
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