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看了OG的解释，以及千行的中文解释，还是没法消除自己的疑惑，希望大大们给予解答，谢谢！OG的解释请查看附件，可以对照着看。
23. Male bowerbirds construct elaborately decorated nests, or bowers. Basing their judgment on the fact that different local populations of bowerbirds of the same species build bowers (that exhibit different building and decorative styles), researchers have concluded that the bowerbirds’ building styles are a culturally acquired, rather than a genetically transmitted, trait.
Which of the following, if true, would most strengthen the conclusion drawn by the researchers?
(A) There are more common characteristics than there are differences among the bower-building styles of the local bowerbird population that has been studied most extensively.
(B) Young male bowerbirds are inept at bower-building and apparently spend years watching their elders before becoming accomplished in the local bower style.
(C) The bowers of one species (of bowerbird) lack the towers and ornamentation characteristic of the bowers (of most other species of bowerbird).
(D) Bowerbirds are found only in New Guinea and Australia, where local populations of the birds apparently seldom have contact with one another.
(E) It is well known that the song dialects of some songbirds are learned rather than transmitted genetically.
感觉答案B选项也不是特别合理，毕竟也没有排除genetically的可能。生物学上genetically并不意味着出生就会，习得性行为也是genetically的一种啊。
39. Which of the following most logically completes the argument?
Sviatovin is a medieval Moringian text whose author and exact date of composition are unknown. However, the events in the life of Prince Sviatov that the text describes occurred in 1165, and （in the diagram of Sviatov’s family that accompanies the text） his father, who died in 1167, is identified as still living. Thus Sviatovin must have been written between 1165 and 1167, assuming that _______________________ .
(A) the life of Prince Sviatov is not the subject of any other medieval Moringian texts
(B) the author of Sviatovin intended it to provide as accurate a report about Prince Sviatov’s exploits as possible
(C) the diagram accurately represents the composition of Sviatov’s family at the time Sviatovin was written
(D) Sviatovin is the earliest Moringian text whose composition can be dated to within a few years
(E) Sviatovin was not written by Sviatov’s father himself
我觉得答案C选项，说的是两个孤立事件，一项为真并不能表示另一项也为真啊。即使composition of family正确，也不能表示the text describes一定occurred 在1165年啊。
59. Which of the following most logically completes the passage?
A recent government study links the high rates of respiratory ailments in Groverston to airborne pollutants released by the Woodco plywood manufacturing plant there. To address the problem, the government imposed strict regulations on emissions which will go into effect in four years. Although Woodco plans to cut its emissions in half two years ahead of schedule, it is unlikely that the rate of respiratory ailments will decline before the regulations go into effect, since ___ .
(A) the number of facilities capable of treating respiratory ailments is not likely to increase
(B) reducing emissions even further than planned would necessitate decreasing production at Woodco
(C) it is difficult to make accurate, long-term predictions about emissions
(D) not all respiratory ailments are caused by airborne pollutants ※
(E) three new plywood manufacturing plants are about to go into production in Groverston
首先，rate文中并没有指出是指发病率，通常认为是某种疾病在人群中的得病率，即有效的治疗应当有助于减少该rate；
其次，同样的plywood plants并不必然会导致同样引起疾病的emissions of airborne pollutants；
所以这道题我选的是A
77. A recent report determined that although only 3 percent of drivers on Maryland highways equipped their vehicles with radar detectors, 33 percent of all vehicles ticketed for exceeding the speed limit were equipped with them. Clearly, drivers who equip their vehicles with radar detectors are more likely to exceed the speed limit regularly than are drivers who do not.
The conclusion drawn above depends on which of the following assumptions?
(A) Drivers (who equip their vehicles with radar detectors) are less likely to be ticketed for exceeding the speed limit than are drivers who do not.
(B) Drivers (who are ticketed for exceeding the speed limit) are more likely to exceed the speed limit regularly than are drivers who are not ticketed.
(C) The number of vehicles (that were ticketed for exceeding the speed limit) was greater than the number of vehicles (that were equipped with radar detectors).
(D) Many of the vehicles (that were ticketed for exceeding the speed limit) were ticketed more than once in the time period covered by the report.
(E) Drivers on Maryland highways exceeded the speed limit more often than did drivers on other state highways not covered in the report.
我的理解是(33%/3%)>(67%/97%)，即装radar的人中发生违规的概率，大于，未装radar的人中发生违规的概率，我觉得已经足以说明more likely to be ticketed了，至于more likely to be ticketed是否能推导出more likely to exceed，我觉得答案B不能回答这个问题；
103. For a trade embargo against a particular country to succeed, a high degree of both international accord and ability to prevent goods from entering or leaving that country must be sustained. A total blockade of Patria’s ports is necessary to an embargo, but such an action would be likely to cause international discord over the embargo.
The claims above, if true, most strongly support which of the following conclusions?
(A) The balance of opinion is likely to favor Patria in the event of a blockade.
(B) As long as international opinion is unanimously against Patria, a trade embargo is likely to succeed.
(C) A naval blockade of Patria’s ports would ensure that no goods enter or leave Patria.
(D) Any trade embargo against Patria would be likely to fail at some time.
(E) For a blockade of Patria’s ports to be successful, international opinion must be unanimous.
我觉得答案D比答案E更绝对，居然用any这个词。OG中否定E选项给的解释是a high degree of international accord，同样可以批驳D；而且E还比D退了一步，至少在大家协商达成一致之后，blockade还有可能成功。D连这个可能性都被否决了。难道discord一旦被cause就不能平息了吗？
107. Although the discount stores in Goreville’s central shopping district are expected to close within five years as a result of competition from a SpendLess discount department store that just opened, those locations will not stay vacant for long. In the five years since the opening of Colson’s, a nondiscount department store, a new store has opened at the location of every store in the shopping district that closed because it could not compete with Colson’s.
Which of the following, if true, most seriously weakens the argument?
(A) Many customers of Colson’s are expected to do less shopping there than they did before the SpendLess store opened.
(B) Increasingly, the stores that have opened in the central shopping district since Colson’s opened have been discount stores.
(C) At present, the central shopping district has as many stores operating in it as it ever had.
(D) Over the course of the next five years, it is expected that Goreville’s population will grow at a faster rate than it has for the past several decades.
(E) Many stores in the central shopping district sell types of merchandise that are not available at either SpendLess or Colson’s.
我能理解OG想表达的意思，即使你开了店，也会步前人的后尘。但是我觉得这里有个很大的问题，拿Colson's的情况和SpendLess的情况比较，这不是Argument里面最明显的“错误类比”吗？为什么发生在C身上的一定会发生在S身上？
我选的是A选项，整体消费需求的降低才会使得商店关门，不管是C还是S
111. Springfield Fire Commissioner: The vast majority of false fire alarms are prank calls made anonymously from fire alarm boxes on street corners. Since virtually everyone has access to a private telephone, these alarm boxes have outlived their usefulness. Therefore, we propose to remove the boxes. Removing the boxes will reduce the number of prank calls without hampering people’s ability to report a fire.
Which of the following, if true, most strongly supports the claim that the proposal, if carried out, will have the announced effect?
(A) The fire department traces all alarm calls made from private telephones and records where they came from.
(B) Maintaining the fire alarm boxes costs Springfield approximately $5 million annually.
(C) A telephone call can provide the fire department with more information about the nature and size of a fire than can an alarm placed from an alarm box.
(D) Responding to false alarms significantly reduces the fire department’s capacity for responding to fires.
(E) On any given day, a significant percentage of the public telephones in Springfield are out of service.
我能察觉到这道题背后想表达什么意思，漏洞在哪里我也很明白，但是我觉得这个选项设置得太不好了。
答案是A，我选的是C。OG中批驳C所举的例子完全可以用来批驳A，一点差别也没有。为什么C可能发生lack access to a telephone的情况，A就不会呢？
其次，我觉得是C的理由是，在A和C遇到同样问题的时候，private telephone能比fire alarm boxes提供更多有用信息，更加说明了我们要舍弃alarm boxes，有更好的为什么还有用不好的呢？
120. Codex Berinensis, a Florentine copy of an ancient Roman medical treatise, is undated but contains clues to when it was produced. Its first 80 pages are by a single copyist, but the remaining 20 pages are by three different copyists, which indicates some significant disruption. Since a letter in handwriting identified as that of the fourth copyist mentions a plague that killed many people in Florence in 1148, Codex Berinensis was probably produced in that year.
Which of the following, if true, most strongly supports the hypothesis that Codex Berinensis was produced in 1148?
(A) Other than Codex Berinensis, there are no known samples of the handwriting of the first three copyists.
(B) According to the account by the fourth copyist, the plague went on for 10 months.
(C) A scribe would be able to copy a page of text the size and style of Codex Berinensis in a day.
(D) There was only one outbreak of plague in Florence in the 1100s.
(E) The number of pages of Codex Berinensis produced by a single scribe becomes smaller with each successive change of copyist.
我觉得答案D也不是很make sense。What if the first 80 pages are created after 1148? What if the following copyists just describe what they learn about the plague from the history book? None of these two condition helps to confirm the date of Florentine.
以上，我补充两点：
1. 感觉OG的逻辑也不是很经得起细挖，很多strong weak/support也不是逻辑上很强的加强或者削弱；有些像上述出现错误类比的，写Argument的时候必然是主要攻击点啊；实在是其他选项实在离谱，万不得已才选的。如果按照看完题干就先形成逻辑链，再看选项做题的话，有些根本很难找到答案，还得重新按照它的想法去思考。
2. 关于时间轴的确定问题，感觉自己这块是个弱项。但凡碰到确定某样古物是某个年代的，我总觉得没有一个选项能够干净排除其他可能的，都是与其他选项类比之后，才觉得这个答案把范围夹到最小了。
有可能CR的要求并不是要我们找到the best support/the most seriously weaken in the world，只能横向比较。但在做题时仍然是不是会觉得很困惑，在某些点上卡死，大概真的是我想得太多了，也有可能我基本功不扎实导致的，欢迎各位来打脸。
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发表于 2015-9-20 22:14:36
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