单项选择题

A．Music they like can relieve depression but distract attention.
B．Music they like can reduce stress and improve concentration.
C．Classical music and rock-and-roll increases their heart rate and expands the breathing.
D．Wearing headphones can help concentrate when they are performing operations.
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单项选择题
A．They are more likely to damage the cave.B．It’s hard for them to stay awake.C．They tend to break their equipment.D．They may imagine seeing things that aren’t really there.
A．They are more likely to damage the cave.
B．It’s hard for them to stay awake.
C．They tend to break their equipment.
D．They may imagine seeing things that aren’t really there.
单项选择题
A．The need to exercise the memory.B．How the brain differs from other body tissues.C．The unconscious learning of a physical activity.D．How nerves control body movement.
A．The need to exercise the memory.
B．How the brain differs from other body tissues.
C．The unconscious learning of a physical activity.
D．How nerves control body movement.
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