92. Baking for winter holidays is a tradition that may have a sound medical basis. In midwinter, when days are short, many people suffer from a specific type of seasonal depression caused by lack of sunlight. Carbohydrates, both sugars and starches, boost the brain’s levels of serotonin, a neurotransmitter that improves the mood. In this respect, carbohydrates act on the brain in the same way as some antidepressants. Thus, eating holiday cookies may provide an effective form of self-prescribed medication. Which one of the following can be properly inferred from the passage? (A) Seasonal depression is one of the most easily treated forms of depression. (B) Lack of sunlight lowers the level of serotonin in the brain. (C) People are more likely to be depressed in midwinter than at other times of the year. (D) Some antidepressants act by changing the brain’s level of serotonin. (E) Raising the level of neurotransmitters in the brain effectively relieves depression.
131. To become an expert on a musical instrument, a person must practice. If a person practice a musical instrument for three hours each day, they will eventually become expert on that instrument. Therefore, if a person is an expert on a musical instrument, that person must have practiced for at least three hours each day. Which one of the following most accurately describes a flaw in the reasoning above? (A) The conclusion fails to take into account that people who practice for three hours every day might not yet have reached a degree of proficiency that everyone would consider expert. (B) The conclusion fails to take into account that practicing for less than three hours each day may be enough for some people to become experts. (C) the conclusion fails to take into account that if a person has not practiced for at least three hours a day, the person has not become an expert. (D) The conclusion fails to take into account that three consecutive hours of daily practice is not recommended by all music teachers. (E) The conclusion fails to take into account that few people have the spare time necessary to devote three hours daily to practice.
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发表于 2003-10-4 01:09:00
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