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【单选题】
Refined sugar is very dark in color, and it has a lot of impurities.
A.
True
B.
False
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【单选题】People with a lot of stamina have the strength to do difficult things over a long period of time.
A.
True
B.
False
【单选题】People who have been restored to good health after being sick probably feel in good physical condition.
A.
True
B.
False
【单选题】People need good-quality, uninterrupted sleep in order to _____.
A.
help the body repair tissue and restore itself
B.
digest their food efficiently
C.
stop producing growth hormone
D.
have enough energy to exercise
【单选题】Stress and energy levels are related because _____.
A.
exercise helps to get rid of stress
B.
some people suffer from adrenal fatigue
C.
too much stress has negative physical effects on the body
D.
cortisol is not produced sufficiently when the body is under stress
【单选题】A diet that will help athletic performance includes _____.
A.
very little fat
B.
more protein than carbohydrates
C.
the right balance of proteins and carbohydrates
【单选题】According to Dr. Rimes, when athletes live at higher altitudes _____.
A.
they can tolerate colder temperatures
B.
their lungs become more efficient at using oxygen
C.
they can't adjust easily to lower altitudes
【单选题】Training at high temperatures can help athletes improve by _____.
A.
20 percent
B.
12 percent
C.
7 percent
【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
相关题目：
【单选题】People with a lot of stamina have the strength to do difficult things over a long period of time.
A.
True
B.
False
【单选题】People who have been restored to good health after being sick probably feel in good physical condition.
A.
True
B.
False
【单选题】People need good-quality, uninterrupted sleep in order to _____.
A.
help the body repair tissue and restore itself
B.
digest their food efficiently
C.
stop producing growth hormone
D.
have enough energy to exercise
【单选题】Stress and energy levels are related because _____.
A.
exercise helps to get rid of stress
B.
some people suffer from adrenal fatigue
C.
too much stress has negative physical effects on the body
D.
cortisol is not produced sufficiently when the body is under stress
【单选题】A diet that will help athletic performance includes _____.
A.
very little fat
B.
more protein than carbohydrates
C.
the right balance of proteins and carbohydrates
【单选题】According to Dr. Rimes, when athletes live at higher altitudes _____.
A.
they can tolerate colder temperatures
B.
their lungs become more efficient at using oxygen
C.
they can't adjust easily to lower altitudes
【单选题】Training at high temperatures can help athletes improve by _____.
A.
20 percent
B.
12 percent
C.
7 percent
【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
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