TTGWD1-Q30

sedona11

Q30:

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.
4. Free oleic acid is the only acid that unrefined olive oil contains.
5. People who judge the quality of unrefined olive oils actually judge those oils by their acidity, which the judges can taste.

这道题看了网上的很多讨论还是不是很清楚，我觉得D最合理亚。有人说A，我下载的答案是C，但是怎么也看不出来C有什么关系亚？

谢谢大家

用排除法的话，好像是C，但是不是很明白

我的理解如下：

酸性不能决定未提炼的O的质量，尽管未提炼的O中OA越少，质量越好（言下之意决定未提炼的O的还有别的东东），（但是）, OA可以准确衡量（提炼过的）O中的酸性。

D矛盾，错

B与原文矛盾，错

A没提到，错

E无关，错

[此贴子已经被作者于2008-11-3 18:56:12编辑过]

飘逸的梦

我也做错了。当时就是觉得是对必要性的考察。但并没有充分的时间做这题。现在的理解是:

题干是“OA少”不一定直接推出“油质量好”。但试验证明“OA少”一定是“油质量好”的一个很重要的事实（就是一个最重要的指标）

C就是说，如果OA呈中间水平的一桶油，那么它的质量也应该呈中间水平。

C选项狡猾的地方是它没有说OA少的油绝对好，而是根据“但。。。”转折表达的事实推出的含OA中等水平的油质量中等的好。

 

不知道对否。供参考。

kaisandy

我选的是B,不就是排除其他原因来SUPPORT STATEMENT吗?8明白!