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[Critical Reasoning]

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题目：

In order to withstand tidal currents, juvenile horseshoe crabs frequently burrow in the sand. Such burrowing discourages barnacles from clinging to their shells. When fully grown, however, the crabs can readily withstand tidal currents without burrowing, and thus they acquire substantial populations of barnacles. Surprisingly, in areas where tidal currents are very weak, juvenile horseshoe crabs are found not to have significant barnacle populations, even though they seldom burrow.

Which of the following, if true, most helps to explain the surprising finding?

选项:

A、Tidal currents do not themselves dislodge barnacles from the shells of horseshoe crabs.
B、Barnacles most readily attach themselves to horseshoe crabs in areas where tidal currents are weakest.
C、The strength of the tidal currents in a given location varies widely over the course of a day.
D、A very large barnacle population can significantly decrease the ability of a horseshoe crab to find food.
E、Until they are fully grown, horseshoe crabs shed their shells and grow new ones several times a year.

答案:

E
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题目：

Newspaper editorial:
 
In an attempt to reduce the crime rate, the governor is getting tough on criminals and making prison conditions harsher.  Part of this effort has been to deny inmates the access they formerly had to college-level courses.  However, this action is clearly counter to the governor's ultimate goal, since after being released form prison, inmates who had taken such courses committed far fewer crimes overall than other inmates.
 
Which of the following is an assumption on which the argument depends?

选项:

A、Not being able to take college-level courses while in prison is unlikely to deter anyone from a crime that he or she might otherwise have committed.
B、Former inmates are no more likely to commit crimes than are members of the general population.
C、The group of inmates who chose to take college-level courses were not already less likely than other inmates to commit crimes after being released.
D、Taking high school level courses in prison has less effect on an inmate's subsequent behavior than taking college-level courses does.
E、The governor's ultimate goal actually is to gain popularity by convincing people that something effective is being done about crime.

答案:

C
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[Sentence Correction]

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题目：

Women are expected to be the majority of students entering law school this fall, a trend ultimately placing more women in leadership positions in politics and business.
 

选项:

A、 Women are expected to be the majority of students entering law school this fall, a trend ultimately placing
B、 The majority of students entering law school this fall are expected to be women, a trend that will ultimately place
C、 The majority of students entering law school this fall are expected to be women, which will ultimately place
D、 It is expected that the majority of students entering law school this fall will be women, a trend ultimately placing
E、 It is expected for women to be the majority of students entering law school this fall, which will ultimately place

答案:

B
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[Sentence Correction]

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题目：

Faulty voting equipment, confusing ballots, voter error, and problems at polling places have been cited by a new study of the 2000 United States presidential election, which estimated that they did not count 4 million to 6 million of the 100 million votes cast.

选项:

A、Faulty voting equipment, confusing ballots, voter error, and problems at polling places have been cited by a new study of the 2000 United States presidential election, which estimated that they did not count 4 million to 6 million of the 100 million votes cast.
B、Citing faulty voting equipment, confusing ballots, voter error, and problems at polling places, a new study of the 2000 United States presidential election has estimated that 4 million to 6 million of the 100 million votes cast were not counted.
C、Citing faulty voting equipment, confusing ballots, voter error, and problems at polling places, 4 million to 6 million of the 100 million votes cast were not counted in the 2000 United States presidential election, a new study estimates.
D、A new study has cited faulty voting equipment, confusing ballots, voter error, and problems at polling places in estimating that 4 million to 6 million of the 100 million votes that were cast had not been counted in the 2000 United States presidential election.
E、A new study of the 2000 United States presidential election, citing faulty voting equipment, confusing ballots, voter error, and problems at polling places, has estimated 4 million to 6 million votes had not been counted of the 100 million votes cast.

答案:

B
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[Critical Reasoning]

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题目：

During the past year, Pro-Tect Insurance Company's total payouts on car-theft claims were larger than the company can afford to sustain.  Pro-Tect cannot reduce the number of car-theft policies it carries, so cannot protect itself against continued large payouts that way.  Therefore, Pro-Tect has decided to offer a discount to holders of car-theft policies whose cars have antitheft devices.  Many policyholders will respond to the discount by installing antitheft devices, since the amount of the discount will within two years typically more than cover the cost of installation.  Thus, because cars with antitheft devices are rarely stolen, Pro-Tect's plan is likely to reduce its annual payouts.
 
In the argument above, the two portions in boldface play which of the following roles?

选项:

A、The first rules out a certain strategy for achieving a goal; the second presents the strategy that was adopted instead and whose effectiveness the argument assesses.
B、The first is a judgment made in support of a certain conclusion; the second is that conclusion.
C、The first has been used as a consideration to support adopting a certain strategy for achieving a goal; the second reports a decision to adopt an alternative strategy.
D、The first provides evidence in favor of adopting a certain strategy for achieving a goal; the second reports a decision to pursue an alternative goal.
E、The first is a consideration offered against adopting a certain strategy for achieving a goal; the second is the main conclusion that the argument is seeking to establish.

答案:

A
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题目：

Retailers reported moderate gains in their November sales, as much because of their sales of a year earlier being so bad as that shoppers were getting a head start on buying their holiday gifts.

选项:

A、of their sales of a year earlier being so bad as that
B、of their sales a year earlier having been as bad as because
C、of their sales a year earlier being as bad as because
D、their sales a year earlier had been so bad as because
E、their sales of a year earlier were as bad as that

答案:

D
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题目：

Unearthed in China, fossils of feathered dinosaurs offer the most dramatic evidence yet discovered of the close evolutionary relationship between dinosaurs and birds.

选项:

A、offer the most dramatic evidence yet discovered of the close evolutionary relationship between dinosaurs and birds
B、offer evidence more dramatic than what has yet been discovered of the close evolutionary relationship between dinosaurs and birds
C、offer more dramatic evidence of the close evolutionary relationship than any yet discovered between dinosaurs and birds
D、have offered the most dramatic evidence of the close evolutionary relationship between dinosaurs and birds that have yet been discovered
E、have offered more dramatic evidence than any that has yet been discovered of the close evolutionary relationship between dinosaurs and birds

答案:

A
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题目：

Between 1990 and 2000 the global economy grew more than it did during the 10,000 years from the beginning of agriculture to 1950.

选项:

A、Between 1990 and 2000 the global economy grew more than it did during the 10,000 years from the beginning of agriculture
B、Between 1990 and 2000 the growth of the global economy was more than that during 10,000 years, from when agriculture began
C、The growth of the global economy between 1990 and 2000 exceeds that which had been for 10,000 years from the beginning of agriculture
D、The growth of the global economy between 1990 and 2000 exceeds what it has been for 10,000 years, from when agriculture began
E、The growth of the global economy between 1990 and 2000 exceeded what it did for the 10,000 years from the beginning of agriculture

答案:

A
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[Critical Reasoning]

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题目：

Advertising by mail has become much less effective, with fewer consumers responding. Because consumers are increasingly overwhelmed by the sheer amount of junk mail they receive, most discard almost all offers without considering them. Thus, an effective way for corporations to improve response rates would be to more carefully target the individuals to whom they mail advertising, thereby cutting down on the amount of junk mail each consumer receives.

Which of the following, if true, would most support the recommendation above?

选项:

A、There are cost-effective means by which corporations that currently advertise by mail could improve response rates.
B、Many successful corporations are already carefully targeting the individuals to whom they mail advertising.
C、Any consumer who, immediately after receiving an advertisement by mail, merely glances at it is very likely to discard it.
D、Improvements in the quality of the advertising materials used in mail that is carefully targeted to individuals can improve the response rate for such mail.
E、Response rates to carefully targeted advertisements by mail are considerably higher, on average, than response rates to most other forms of advertising.

答案:

E
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[Reading Comprehension]

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文章：

    In its 1903 decision in the case of Lone Wolf v. Hitchcock, the United States Supreme Court rejected the efforts of three Native American tribes to prevent the opening of tribal lands to non-Indian settlement without tribal consent. In his study of the Lone Wolf case, Blue Clark properly emphasizes the Court's assertion of a virtually unlimited unilateral power of Congress (the House of Representatives and the Senate) over Native American affairs. But he fails to note the decision's more far-reaching impact: shortly after Lone Wolf, the federal government totally abandoned negotiation and execution of formal written agreements with Indian tribes as a prerequisite for the implementation of federal Indian policy. Many commentators believe that this change had already occurred in 1871 when— following a dispute between the House and the Senate over which chamber should enjoy primacy in Indian affairs—Congress abolished the making of treaties with Native American tribes. But in reality the federal government continued to negotiate formal tribal agreements past the turn of the century, treating these documents not as treaties with sovereign nations requiring ratification by the Senate but simply as legislation to be passed by both houses of Congress. The Lone Wolf decision ended this era of formal negotiation and finally did away with what had increasingly become the empty formality of obtaining tribal consent.

题目：

The author of the passage is primarily concerned with

选项:

A、identifying similarities in two different theories
B、evaluating a work of scholarship
C、analyzing the significance of a historical event
D、debunking a revisionist interpretation
E、exploring the relationship between law and social reality

答案:

C
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[Undefined]

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An unusually severe winter occurred in Europe after the continent was blanketed by a blue haze resulting from the eruption of the Laki Volcano in the European republic of Iceland in the summer of 1984.  Thus, it is evident that major eruptions cause the atmosphere to become cooler than it would be otherwise.
Which of the following statements, if true, most seriously weakens the argument above?
C选项为什么就不会有张冠李戴的问题呢，1984和1982的气候情况能一样吗，C里的火山就可以试用于原文的火山吗
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[Undefined]

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The rate of a certain chemical reaction is directly proportional to the square of the concentration of chemical A present and inversely proportional to the concentration of chemical B present. If the concentration of chemical B is increased by 100 percent, which of the following is closest to the percent change in the concentration of chemical A required to keep the reaction rate unchanged?
为什么这个题一定是相乘不能是相加呢？y=k1A方-k2B （k1,k2大于0 ），也满足题目说的与A方成正比与B成反比啊？但是这道题只有相乘的情况才能选出正确答案
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Tiger beetles are such fast runners that they can capture virtually any nonflying insect.  However, when running toward an insect, the beetles intermittently stop, and then, a moment later, resume their attack.  Perhaps they cannot maintain their pace and must pause for a moment's rest; but an alternative hypothesis is that while running tiger beetles are unable to process the resulting rapidly changing visual information, and so quickly go blind and stop.
 
Which of the following, if discovered in experiments using artificially moved prey insects, would support one of the two hypotheses and undermine the other?
答案C是怎么支持一个猜想又削弱另一个猜想的？
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[GWD]

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The author of the passage implies that which of the following is a possible partial explanation for acquisition behavior during the 1970's and 1980's?
请解释这道题为什么不选C或E，除了正确选项B，我认为文中也正确地提到了这两个选项可以解释acquisition behavior during 1970s and 80s
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[OG]

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The primary purpose of the passage is to
为什么选E不选B
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[Undefined]

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Club X has more than 10 but fewer than 40 members. Sometimes the members sit at tables with 3 members at one table and 4 members at each of the other tables, and sometimes they sit at tables with 3 members at one table and 5 members at each of the other tables. If they sit at tables with 6 members at each table except one and fewer than 6 members at that one table, how many members will be at the table that has fewer than 6 members?
提问小梅老师 这道题求讲一下 我没什么思路 带入数字得的是3
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A photography dealer ordered 60 Model X cameras to be sold for $250 each, which represents a 20 percent markup over the dealer's initial cost for each camera. Of the cameras ordered, 6 were never sold and were returned to the manufacturer for a refund of 50 percent of the dealer's initial cost. What was the dealer's approximate profit or loss as a percent of the dealer's initial cost for the 60 cameras?
请问小梅老师 这道题讲讲一下 我算的是19% 原来成本是200每个 亏了6个 每个亏100. 最后得不出答案
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Analytical!
请问may老师，这题该用什么思路来做？
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Analytical!
请问张老师，这道题为什么D不对？我有我觉得second paragraph最后一句话特别指向D
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Analytical!
请问老师，这道题为什么second part是”evidence”? 还有、不确定First part到底是background info还是premise?
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