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【单选题】
Training at high temperatures can help athletes improve by _____.
A.
20 percent
B.
12 percent
C.
7 percent
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【单选题】Training in hot conditions helps because it _____.
A.
improves blood flow
B.
improves lung efficiency
C.
reduces sweating
【单选题】Attaching significance to an object can _____.
A.
decrease performance
B.
improve performance
C.
cause stress
【单选题】Apples and onions are good for athletes because they contain _____.
A.
quercetin
B.
Vitamin D
C.
protein
相关题目：
【单选题】Training in hot conditions helps because it _____.
A.
improves blood flow
B.
improves lung efficiency
C.
reduces sweating
【单选题】Attaching significance to an object can _____.
A.
decrease performance
B.
improve performance
C.
cause stress
【单选题】Apples and onions are good for athletes because they contain _____.
A.
quercetin
B.
Vitamin D
C.
protein
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