单项选择题
According to the passage, however intelligent a robot may be, it ______ .
A.acts as an ordinary animal
B.is nothing but a machine
C.is viewed as a modern myth
D.is regarded as a human being
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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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单项选择题
The author mentions that the maximum THR for older adult participants in sports should be less than ______ beats per minute.
A.60
B.120
C.180
D.240
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