老prep上一道逻辑题求助

daier

Columnisteople should avoid using a certain artificial fat that has been touted（吹捧，赞扬）as a resource for those whose medical advisers have advised them to reduce their fat intake.Although the artificial fat, which can be used in place of fat in food preparation, has none of the negative health effects of fat, it does have a serious drawback:it absorbs certain essential vitamins, thereby preventing them from being used by the body.



In evaluating the columnist's position, it would be most useful to determine which of the following?



(A) Whether increasing one's intake of the vitamins can compensate for the effects of the artificial fat

(B) Whether the vitamins that the artificial fat absorbs are present in foods that contain the fat

(C) Whether having an extremely low fat intake for an extended period can endanger the health

(D) Whether there are any foods that cannot be prepared using the artificial fat as a substitute for other fats

(E) Whether people are generally able to detect differences in taste between foods prepared using the artificial fat and foods that are similar except for the use of other fats






答案:A
我选了B，我觉得那种fat既然会阻碍维生素的吸收，那么如果在有FAT的食物里没有维生素，那么FAT的这种副作用在实际生活中也不么会有什么影响。
选A的话，多多摄入维生素是否能够补偿FAT的副作用，我总觉得怎么看怎么不靠谱儿啊。
另外我想问问题目中的the columnist's position指的是,it does have a serious drawback吗？？

wangsiwei

同意你的最后一句话。
B不对因为这些吃人工fat的人不能吃天然的fat，所以人工fat也无从吸收V了。
而且你想的有点多，逻辑虽然有时候会比较绕，但是绝对不会出结论的范围的。这个题的逻辑重心就是－－因为人工F吸收V，所以不要用F。如果weaken的话，就会说V会通过别的方式得到，所以不会有影响。
不知道说明白了没有。

giantcb

那为什么正确答案是A 呢？ 怎么看都不太对啊。
我选了D。 求指教

daier

谢谢楼上的楼上，我想我明白了，你看看我这样理解对吗？:
人工FAT的副作用是阻止维生素的吸收，所以C建议人们还是避免使用这种人工的FAT.但是如果A的条件成立，也就是说多摄取维生素能够弥补人工FAT的这种副作用，那么也就削弱了C的建议。而如果A的条件不成立，那么C的建议就被加强了
至于B，现在看看，确实不对，反正都不能吃FAT了，那么FAT里有没有维生素也就无所谓了。