狒狒逻辑46题，求问！

鹤源

46. Twelvehealthy volunteers with the Apo-A-IV-1 gene and twelve healthy volunteers whoinstead have the Apo-A-IV-2 gene each consumed a standard diet supplementeddaily by a high-cholesterol food. A high level of cholesterol in the blood isassociated with an increased risk of heart disease. After three weeks, theblood cholesterol levels of the subjects in the second group were unchanged,whereas the blood cholesterol levels of those with the Apo-A-IV-1 gene rose 20percent.

Which one of the following is most strongly supported by the informationabove?

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.
C.       The bodies of those who havethe Apo-A-IV-2 gene excrete cholesterol when blood cholesterol reaches acertain level. (？？？)
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-2gene may inhibit the elevation of blood cholesterol.

参考思路：试验题类型。用同一种方法对两种事物进行研究，通常考察两种事物对这种方法是否有应激性，是同向还是反向。

A：无关
B：无关
C：与所提供的信息相反
D：无关，
E：正确，inhibit the elevation of blood cholesterol-----〉the bloodcholesterol levels of the subjects in the second group were unchanged
请问C选项错在哪里了？先行谢谢各位大虾！

huisang

题目说Apo-A-IV-2gene 的blood cholesterol levels were unchanged，C说when blood cholesterol reaches a certain level~
我一开始觉得C说blood cholesterol 到了一个级别就排cholesterol，貌似跟题干中说blood cholesterol 不变挺像的，但是发现又自high了……一是排cholesterol不能保证会影响到blood cholesterol，二是即使影响到了，也不一定正好平衡回去，让blood cholesterol 保持不变~
这是我的看法~欢迎拍砖~~~

鹤源

恩，看明白了，多谢！自己琢磨就琢磨不透~

cdwayne

There is no such "excrete cholesterol when blood cholesterol reaches a certain level" in the stimulus.
[Inference/Must be true]

鹤源

There is no such "excrete cholesterol when blood cholesterol reaches a certain level" in the stimulus.
[Inference/Must be true]

-- by 会员 cdwayne (2011/9/9 10:09:47)

不好意思，弱弱的问能用中文解释下吗？

cdwayne

這是inference/must be true題
原文並沒有說excrete cholesterol when blood cholesterol reaches a certain level這件事
excrete: 排泄, 但或許自身基因根本不吸收cholesterol

鹤源

ok，明白了，多谢！