单项选择题

Passage Two

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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单项选择题
A. No one knows.B. The Chinese chef used the wrong recipes.C. The hungry miners requested a new dish to be served.D. A Chinese chef created the dish from the left-overs for the miners.
A. No one knows.
B. The Chinese chef used the wrong recipes.
C. The hungry miners requested a new dish to be served.
D. A Chinese chef created the dish from the left-overs for the miners.
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