快考了，几道JJ对答案！－CR-->bryony转移

dreamerps

以下是引用sweetstar在2005-9-19 18:17:00的发言：

我觉得应该选C。因为A中使用的是oleic acid, 而不是free oleic acid.但是C又和第一句话冲突。

有没有人解释一下。谢谢

第一句话逗号后面不是有一个yet，然而表转折吗？

最后一句话The proportion of free oleic acid that an olive oil contains is an accurate measure of the oil’s acidity. 是用来支持yet extensive tests have shown that the less free oleic acid an unrefined olive oil contains per liter, the higher its quality.  这句话的吧，都出现公共元素free oleic acid ，

A好象是out of scope啊，要说明的是free oleic acid 不是oleic acid，而且是unrefined,不是refined，没有lawyerNN想的那么复杂吧？第一次做很快就可以归纳出C啊，与原文方向一致，考试的时候哪有时间想那么多啊~~

jackdua_cn

I think the reasoning line of this question may be C.

jackdua_cn

when an olive oil is refined, as stated in A, does it still belong to the scope of unrefined olive oil? We need an assumption but we don't have.

黛玉

好长的贴,越看越晕

leonchan

原文：

(1)  A of UO  不能--> Q of UO

(2) FOA of UO↓ --> Q of UO↑

(3) FOA of O --> A of O  （注意不是FOA of O <---> A of O）

我觉得A、C都有问题：

A：文章只提到FOA，没有提OA，因此A的结论不能must be true（必须加入其他没有出现的信息才能推出A）；lawyer的说法必须基于一点：最后一句中的an olive oil＝refined olive oil。

C：从2、3可以看出原文一直在说FOA决定Q、FOA决定A，无法推出A决定Q，所以C不对

pierre_chin

选A的朋友做了一个Assumption,即oil is refined = good quality.

其实文中根本没提过Refined的oil，一直在叙述 Unrefined oil.

A选项可以首先排除。

C的逻辑推理非常清晰、准确。

ppbb

The quality of unrefined olive oil is not actually defined in terms of acidity, yet extensive tests have shown that the less free oleic acid an unrefined olive oil contains per liter, the higher its quality.  The proportion of free oleic acid that an olive oil contains is an accurate measure of the oil’s acidity.

If the statements above are all true, which of the following conclusions is best supported by them?

1. When an olive oil is refined, the concentration of oleic acid in the oil is reduced.



2. The quality of an unrefined olive oil can be determined only by accurately measuring its acidity.



3. If an unrefined olive oil is intermediate in acidity between two other unrefined olive oils, it will also be intermediate between them in quality. 搭桥---用 oleic acid来判断



4. Free oleic acid is the only acid that unrefined olive oil contains.

People who judge the quality of unrefined olive oils actually judge those oils by their acidity, which the judges can taste

billyxiangLi

问题是，为什么

3。（提炼后）橄榄油的游离油酸等同于橄榄有的酸性（只有游离油酸，没有其他酸）

你为什么人为的加上了提练后呢？

aph7

C,这次觉得LAWYER的第三点有问题，同楼上

steveyangxt

以下是引用future2005在2004-9-26 0:18:00的发言：

to robertchu:

Your reasoning is very reasonable. But I'm still confusing with my reasoning. Where is the problem of my reasoning?

following is my reasoning.

我选D.

The quality of unrefined olive oil is not actually defined in terms of acidity, yet extensive tests have shown that the less free oleic acid an unrefined olive oil contains per liter, the higher its quality.  The proportion of free oleic acid that an olive oil contains is an accurate measure of the oil’s acidity.

1. 注意第一句的yet, 是反对前面的陈述, 也就是作者认为---The quality of unrefined olive oil should be actually defined in terms of acidity. 这句话应与extensive tests have shown that the less free oleic acid an unrefined olive oil contains per liter, the higher its quality所表达的意思一致. 由此可推出: acidity 就是 free oleic acid 的acidity.

2. The proportion of free oleic acid that an olive oil contains is an accurate measure of the oil’s acidity.

注意accurate. 如果olive oil 还含有其他的acid, 那么The proportion of free oleic acid 就不可能是an accurate measure of the oil’s acidity.

lawyer made a quote good argument, but two points should be made clear;

1，yet的作用没用上。 转折， 所以前面的就不能作为论据了。

2，lawyer 给第三句话加上提炼后， 有待商榷