再次面对这道题:
6.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?
- When an olive oil is refined, the concentration of oleic acid in the oil is reduced.
- The quality of an unrefined olive oil can be determined only by accurately measuring its acidity.
- If an unrefined olive oil is intermediate in acidity between two other unrefined olive oils, it will also be intermediate between them in quality.
- 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.(06/18/2004)
觉得还是选C。从阅读技巧对yet的理解,yet后面的内容和前面相反。既然前半句说酸度不能作为衡量质量的标准,后半句肯定说还是可以衡量的。所以C说明了通过酸度来判断质量,是题目的结论。
可以从另一个角度理解,说不能衡量的意思应该是说不能定量分析;说能衡量应该是说可以定性判断。
而C恰好避开了定量分析,而从定性判断上来说明,正好符合题意。
不知道这样解释是否合理。 |