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 modem myth
D．is regarded as a human being
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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
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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