Research by Dr. Cameron seems to suggest that exercise can To be beneficial, exercise for older people should

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问题 Research by Dr. Cameron seems to suggest that exercise can
To be beneficial, exercise for older people should

选项 A、be done in a group.
B、be done on a daily basis.
C、involve great difficulty.
D、increase the heart rate.

答案D

解析

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职称英语卫生类A级

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