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标题: 请教OG12-99 [打印本页]

作者: sl44999 时间: 2009-9-17 21:28
标题: 请教OG12-99

99.Which of the following most logically completes the argument?

The irradiation of food kills bacteria and thus retards spoilage. However,it also lowers the nutritional value of many foods.For example,irradiation destroys a significant percentage of whatever vitamin B1 a food may contain.Proponents of irradiation point out that irradiation is no worse in this respect than cooking.However,this fact is either beside the point , since much irradiated food is eaten raw,or else misleading since--------------------

A.many of the proponents of irradiation are food distributors who gain from foods' having a longer shelf life

B.it is clear that killing bacteria that may be present on food is not the only effect that irradiation has

C.cooking is usually the final step in preparing food for consumption , whereas irradiation serves to ensure a longer shelf life for perishable foods

D.certain kinds of cooking are, in fact, even more destructive of vitamin B1 than carefully controlled irradiation is

E.for food that is both irradiated and cooked ,the reduction of vitamin B1 associated with either process individually is compounded

答案选E 请给位NN讲解一下啊，在下新人请稍微详细一点啊~十分感谢（题目读的也不是很懂）

[此贴子已经被作者于2009/9/17 22:59:07编辑过]

作者: jiyiflora 时间: 2009-9-18 00:51
Honestly speaking, I did not answer it correctly from the begining either but figured out the reason why I was wrong.

题目大意
食物辐射技术可以杀害细菌而防止食物变质，但是与此同时它也降低了食物的营养价值，比如说，它从一定程度上损害了食物里含有的维他命B。
但是偏爱食物辐射技术的人就说其实如果煮食食物的话，辐射技术也没有什么不好。但是这个说法要么没有说到点上，因为很多此类食物都是被生吃的，要么就是有误导之嫌......

这误导就是题目中提到的一个已成的事实那就是食物辐射已经损害了维他命B.
那么就是E答案

经过辐射技术后再煮食，或是任何一个过程，都无法改变维他命减低的事实。

作者: sl44999 时间: 2009-9-18 20:58
哦谢谢你的讲解可是还有一点不是很明白就是这个说法有误导那么误导是什么呢？

作者: quarboy 时间: 2009-9-18 21:20

反对者所说的misleading是针对proponent的论据的（即irradiation is no worse in this respect than cooking。in this respect是指营养流失这个角度。且这个论据是把irradiation去跟cook比较后，得出irradiation没什么不好的）。

那反对者反驳proponent的论据是从两个方面着手的（还是跟cook比较）：

1）beside the point，跟cook比较没意思，因为很多这样的食物是不用cook的

2）misleading：即便有些食物是要cook的，那cook的结果是，营养流失更多了。（这里所谓的misleading是指，proponent的观点中，隐含的假设是irradiation和cook就像互斥的两个方案，这样比较得出的结论才有意义。而实际情况是，这两个根本不能互斥，相反是会同时出现--在第二种情况下，所以proponent的观点是misleading的）

作者: sl44999 时间: 2009-9-20 11:21
十分感谢~看来我又必要复习下逻辑的基本理论知识了~~~~~

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