GMAT逻辑题目:

　　Baking for winter holidays is a traditionthat may have a sound medical basis. In midwinter, when days are short, manypeople suffer from a specific type of seasonal depression caused by lack ofsunlight. Carbohydrates, both sugars and starches, boost the brain’s levels ofserotonin, 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-prescribedmedication.

　　Which one of the following can be properlyinferred from the passage?

　　A. Seasonaldepression is one of the most easily treated forms of depression.

　　B. Lackof sunlight lowers the level of serotonin in the brain.

　　C. People are more likely to be depressed inmidwinter than at other times of the year.

　　D. Someantidepressants act by changing the brain’s level of serotonin.

　　E. Raising the level of neurotransmitters inthe brain effectively relieves depression.

　　参考答案：D

　　思路：从这句话, boostthe brain’levels ofserotonin, a neurotransmitter that improves the mood, 得知, 只是serotonin有抗忧郁的作用, 而不是所有的neurotransmitter.

　　D is correct.

　　A，most easily treated forms和原文无关

　　B，没有提到的无关信息

　　C，无关比较

　　E，把原文的信息扩大范围了，原文说的是a neurotransmitter， E中变成了所有neurotransmitters。

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