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Q18: Since ancient times, drugs have been used
Q29: Because it depresses or inhibits the centers
Q33: National surveys indicate that about _ percent
Q35: The brain's interpretation of sensory information so
Q88: According to Helmholtz's trichromatic theory, which of
Q120: A child is scolded for using his
Q170: Susceptibility to motion sickness appears to be
Q210: "Every morning a train goes by my
Q220: Sleep apnea is a disorder characterized by
Q260: The most addictive and dangerous stimulant in