gwd-2-17,gwd-2-21

Q17:

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.

   Answer: c

b为什么不对呢？

Q21:

Environmental organizations want to preserve the land surrounding the Wilgrinn Wilderness Area from residential development.  They plan to do this by purchasing that land from the farmers who own it.  That plan is ill-conceived:  if the farmers did sell their land, they would sell it to the highest bidder, and developers would outbid any other bidders.  On the other hand, these farmers will never actually sell any of the land, provided that farming it remains viable.  But farming will not remain viable if the farms are left unmodernized, and most of the farmers lack the financial resources modernization requires.  And that is exactly why a more sensible preservation strategy would be to assist the farmers to modernize their farms to the extent needed to maintain viability.

In the argument as a whole, the two boldface proportions play which of the following roles?

1. The first presents a goal that the argument rejects as ill-conceived; the second is evidence that is presented as grounds for that rejection.


2. The first presents a goal that the argument concludes cannot be attained; the second is a reason offered in support of that conclusion.


3. The first presents a goal that the argument concludes can be attained; the second is a judgment disputing that conclusion.


4. The first presents a goal, strategies for achieving which are being evaluated in the argument; the second is a judgment providing a basis for the argument’s advocacy of a particular strategy.


5. The first presents a goal that the argument endorses; the second presents a situation that the argument contends must be changed if that goal is to be met in the foreseeable future.

答案是d，b为什么不对呢？

请教了，多谢！

1. B (we cannot conclude whether acidity is the only indicator to the quality of olive oil.

2. From the beginning of second boldface, the argument presents another possible solution to achieve the strategy that could preserve the land successfully, that is, to keep it viable.

To be discussed...

Q17的讨论请见:

http://forum.chasedream.com/dispbbs.asp?BoardID=24&replyID=493822&id=56858&skin=0

Q21的讨论请见：

http://forum.chasedream.com/dispbbs.asp?BoardID=24&ID=54618

only有问题。

另外，个人以为，C其实描述的相当准确。题目中的第一句话讲 The quality of unrefined olive oil is not actually defined in terms of acidity（其实acidity 是判断精油质量的参数），用free oleic acid 可以判断unrefined olive oil 的质量，第二句话又说用free oleic acid 也可以判断oil’s acidity.就可以推导出来，free oleic acid 在两个阶段都有媒介作用。

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.

所以, 答案应该是D.

d is irrelevent,cos you can not find,in the whole passage,anything taht metions or implies that this free acid is the only acid....

同意5楼的答案、但是观点有漏洞，可以存在其他acid, 只要那么其他acid 和free oleic 的比例固定就可以，所以要加上第一句，unrefined olive oil 的acidity 从来没有被定义过，即如果有其他ACID，由于比例不知道（没有被定义、分析过、当然不知道其他acid 和free oleic 的比例是否固定）会影响accurate。

既因为如果有其他acid由于这个ACID的比例是多少不知道，影响accurate所以一定没有其他acid

所以, 答案应该是D.

d  .