单项选择题

The passage is a piece of ______ .

A．description
B．narration
C．argumentation
D．disposition
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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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