一道逻辑题，急求答案和解析

larry0UID: 3407591

为啥我觉得该选A(￣▽￣")
C说有些含gamma多的食物大部分人不吃，但是可能这些食物本来就没包含在typical diet里，所以即使不吃gamma也够了，不用额外添加
D说diet里gamma吃的多的人更会去吃补充剂，那补充剂里加不加gamma就无所谓咯反正本身也吃够了

而A说吃仅有alpha的补充剂会造成伤害，所以必须要加gamma？

正确答案是啥？

xxxyw1993UID: 3675916

同问答案是啥。。。读完原文觉得空里的句子大概是“不是每个人都会吃typical diet”的，所以可能是C？

shine1020UID: 2281832

觉得都不太正确
FACTS:
1) Vitamin E is helpful
2) Two forms of vitamin E exist
3) One form of vitamin E is alpha, on form of vitamin E is gamma
4) gamma is supplemented by typical person's diet
5) gamma should be added into supplements

17. Which of the following most logically completes the argument?
A. Any boost in the level of the alpha form in a person’s body will tend to suppress the level of the gamma form in that person’s body.
-Supplements Facts 3, 4
-contradicts fact 5, adding alpha supresses gamma, so a supplement adding alpha and gamma may cancel out!
B. The alpha and the gamma forms can easily be combined in a stable form suitable for use in vitamin supplements.
-Supplements Facts 3, 5
-easily combinable doesn't persuade one to actually do so, no benefit listed
C. There are some foods containing high levels of the gamma form that are not a part of most people’s diets.
-Contradicts fact 4, typical diet should typically include "most people's diets"
-Does not supplement fact 5
D. People who take vitamin supplements are more likely to maintain a diet containing high levels of the gamma form than are people who do not take vitamin supplements.
-contradicts fact 5, this would be an argument against adding gamma
E. In the process currently used to manufacture vitamin E supplements, the gamma form of the vitamin is actually removed as a result of steps taken to purify the alpha form.
-contradicts fact 5, argument against adding since it would either be removed, or require a new manufacturing process

lyuchen.icaUID: 2626437

答案是A. C不对，因为C的设定与原文事实相悖。