请讨论新鲜题!

tulipmontreal

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.

[此贴子已经被作者于2004-6-18 8:47:58编辑过]

醋醋妹妹

偶选C.

groundkeeper

C,

anewyear

C，用的是排出法

waterpoo

为什么呀,我怎么觉得是B呢?请指教

LES

以下是引用waterpoo在2004-6-18 11:00:00的发言：
为什么呀,我怎么觉得是B呢?请指教

B与提干yet extensive tests have shown that the less free oleic acid an unrefined olive oil contains per liter, the higher its quality.矛盾；而C恰恰是此句话的转意。

waterpoo

原来如此....多谢了!

tulipmontreal

偶的理解是 这个题是推论题， B 不能推出，因为有ONLY

偶的答案是C

kingsoft

    我也选C，必要条件，原文推选项，只有C