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标题: 请教狒狒逻辑中的一题 [打印本页]

作者: fionalovesunny 时间: 2013-8-11 01:35
标题: 请教狒狒逻辑中的一题

46. Twelve healthy volunteers withthe Apo-A-IV-1 gene and twelve healthy volunteers who instead have theApo-A-IV-2 gene each consumed a standard diet supplemented daily by ahigh-cholesterol food. A high level of cholesterol in the blood is associatedwith an increased risk of heart disease. After three weeks, the bloodcholesterol levels of the subjects in the second group were unchanged, whereasthe blood cholesterol levels of those with the Apo-A-IV-1 gene rose 20 percent.

Which one of the following is moststrongly supported by the information above?

(A) Approximately half thepopulation carries a gene that lowers cholesterol levels.

(B) Most of those at risk of heartdisease may be able to reduce their risk by adopting a low-cholesterol diet.

(D) The presence of the Apo-A-IV-1gene seems to indicate that a person has a lower risk of heart disease.

(E) The presence of the Apo-A-IV-2 gene may inhibit the elevation of blood cholesterol.

这道题答案是e。其实我能理解e为什么对。但是c为什么不能选呢？？求NN指教。谢谢！

作者: lhz910216 时间: 2013-8-11 17:48
c不对啊~题目只说了Apo-A-IV-2 gene的人blood cholesterol不增多，但没有给出具体的机制，c是excrete排出，排泄，这纯属瞎猜嘛~~还有可能是digest，还有可能是conbine with other substances，结果都是不增多~

作者: 拧发条喵 时间: 2013-8-11 21:25
同意楼上
(C) The bodies of those who have the Apo-A-IV-2 geneexcrete cholesterol when blood cholesterol reaches a certain level.
AAI2基因能在血液胆固醇达到一定高值时排出胆固醇
(E) The presence of the Apo-A-IV-2 gene may inhibit the elevation of blood cholesterol.
AAI2基因可以防止胆固醇升高

基本上C是细化了E选项，而题干中根本没有给出相关信息，应该选择根据题干推出的最直接的选项E

作者: fionalovesunny 时间: 2013-8-12 01:13
谢谢了！明白了哈哈

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