请教LSAT-Set3-SecI-15

gu946 · 发表于 2003-7-10 23:17:00

15. Baking for winter holidays is 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 improve
the mood. In this respect, carbon hydrates 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.
答案是B,B是可以从文中推出,但是DE错在哪里呢?DE好象也可以从文中推出啊?
"carbon hydrates act on the brain in the same way as some antidepressants"可以推出D," boost the brain's levels of serotonin, a neurotransmitter that improve the
mood. "可以推出E

[此贴子已经被作者于2003-7-10 23:22:37编辑过]

mindfree · 发表于 2003-7-11 03:04:00

I think the correct answer should be D.

B can not be inferred from the passage. Lower level of serotonin might not be the only cause of depression. Lack of sunlight might cause something else which in turn causes depression.

E is not correct as Seronotin is only one type of neurotransmitters. So raising this particular type of neurotransmitter, as indicated by the passage, will boost mood. We can not infer that raising other neurotransmitters will do the same.

Please double check the answer and confirm.

gu946 · 发表于 2003-7-11 13:50:00

我查了答案是D,mindfree说的有道理!

Bensontuo · 发表于 2019-7-23 22:29:12

gu946 发表于 2003-7-10 23:17
15. Baking for winter holidays is tradition that may have a sound medical basis. In midwinter, when ...

P1: Lack of sun light ----> Depression

P2: Carbs ---> Increased serotonin ---> Mood improved.

P3: Carbs acts the same way as some anti-depressants.

C: Cookies ---> Carbs ---> provide an effective form of self prescribed medication

Inferences:

If ( if eat carbs, then moods improved ), then the serotonin level must be leveled.

Some Anti-depressant work the same as cookie, then at least one of the anti depressant must boost the level of the serotonin.

Answer: D.

请教LSAT-Set3-SecI-15

请教LSAT-Set3-SecI-15

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