[解析] M: Oh, I should have checked to see if you like ro-找考题网

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单项选择题

A. To maintain a high heart rate for the longest duration.B. To reach and maintain your target heart rate for the entire exercise.C. To burn calories as efficiently as possible.D. To maximize your heart rate and get rid of extra fat.

A. To maintain a high heart rate for the longest duration.
B. To reach and maintain your target heart rate for the entire exercise.
C. To burn calories as efficiently as possible.
D. To maximize your heart rate and get rid of extra fat.

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