问答

1答疑

[Data Sufficiency]

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题目：

A country’s per capita national debt is its national debt divided by its population. Is the per capita national debt of Country G within $5 of $500 ?
  1. Country G’s national debt to the nearest $1,000,000,000 is $43,000,000,000.
  2. Country G’s population to the nearest 1,000,000 is 86,000,000.

选项:

A、Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient.
B、Statement (2) ALONE is sufficient, but statement (1) alone is not sufficient.
C、BOTH statements TOGETHER are sufficient, but NEITHER statement ALONE is sufficient.
D、EACH statement ALONE is sufficient.
E、Statements (1) and (2) TOGETHER are NOT sufficient.

答案:

E
1答疑

[Data Sufficiency]

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题目：

If S is the sum of the first n positive integers, what is the value of n ?
  1. S < 20
  2. S 2 > 220

选项:

A、Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient.
B、Statement (2) ALONE is sufficient, but statement (1) alone is not sufficient.
C、BOTH statements TOGETHER are sufficient, but NEITHER statement ALONE is sufficient.
D、EACH statement ALONE is sufficient.
E、Statements (1) and (2) TOGETHER are NOT sufficient.

答案:

C
1答疑

[Sentence Correction]

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题目：

Making things even more difficult has been general market inactivity lately, if not paralysis, which has ­provided little in the way of pricing guidance.

选项:

A、has been general market inactivity lately, if not paralysis, which has provided
B、there is general market inactivity, if not paralysis, lately it has provided
C、general market inactivity, if not paralysis, has lately provided
D、lately, general market inactivity, if not paralysis, has provided
E、is that lately general market inactivity, if not paralysis, which provides

答案:

D
1答疑

[Critical Reasoning]

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题目：

Distressed by his own personal tragedies, the Roman philosopher Cicero once asked himself whether a wise person should try to achieve the Stoic ideal of complete emotionlessness. Cicero reasoned that, however desirable the goal may be, a wise person could never attain it, since emotions are not simply irrational urges. They are, rather, a product of one’s estimate of the goodness and badness of the events, people, and actions one witnesses.

Which of the following is an assumption required by Cicero’s reasoning?

选项:

A、Wise people inevitably evaluate at least some of the things they observe.
B、Irrationality makes evaluation of what one observes impossible.
C、Wisdom precludes attempting to attain what one cannot.
D、If evaluations are based only on reason, then they are inaccurate.
E、A wise person will not evaluate what cannot be directly observed.

答案:

A
1答疑

[Problem Solving]

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题目：

The value of (9×107)(9×108) is closest to which of the following?
⁳

选项:

A、1016
B、1017
C、1056
D、1057
E、1058

答案:

B
1答疑

[Data Sufficiency]

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题目：

Is the average (arithmetic mean) of the numbers x, y, and z greater than z ?
  1. z – x < y – z
  2. x < z < y

选项:

A、Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient.
B、Statement (2) ALONE is sufficient, but statement (1) alone is not sufficient.
C、BOTH statements TOGETHER are sufficient, but NEITHER statement ALONE is sufficient.
D、EACH statement ALONE is sufficient.
E、Statements (1) and (2) TOGETHER are NOT sufficient.

答案:

A
1答疑

[Problem Solving]

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题目：

The interior of a rectangular carton is designed by a certain manufacturer to have a volume of x cubic feet and a ratio of length to width to height of 3 : 2 : 2. In terms of x , which of the following equals the height of the carton, in feet?

选项:

A、
B、
C、
D、
E、

答案:

B
1答疑

[Sentence Correction]

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题目：

Galileo did not invent the telescope, but on hearing, in 1609, that such an optical instrument had been made, he quickly built his own device from an organ pipe and spectacle lenses.

选项:

A、Galileo did not invent the telescope, but on hearing, in 1609, that such an optical instrument had been made, he
B、Galileo had not invented the telescope, but when he heard, in 1609, of such an optical instrument having been made,
C、Galileo, even though he had not invented the telescope, on hearing, in 1609, that such an optical instrument had been made, he
D、Even though Galileo did not invent the telescope, on hearing, in 1609, that such an optical instrument had been made,
E、Even though Galileo did not invent the telescope, but when he heard, 1609, of such an optical instrument being made, he

答案:

A
1答疑

[Reading Comprehension]

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文章：

    Linda Kerber argued in the mid-1980's that after the American Revolution (1775-1783), an ideology of "republican motherhood" resulted in a surge of educational opportunities for women in the United States. Kerber maintained that the leaders of the new nation wanted women to be educated in order to raise politically virtuous sons. A virtuous citizenry was considered essential to the success of the country's republican form of government; virtue was to be instilled not only by churches and schools, but by families, where the mother's role was crucial. Thus, according to Kerber, motherhood became pivotal to the fate of the republic, providing justification for an unprecedented attention to female education.

    Introduction of the republican motherhood thesis dramatically changed historiography. Prior to Kerber's work, educational historians barely mentioned women and girls; Thomas Woody's 1929 work is the notable exception. Examining newspaper advertisements for academies, Woody found that educational opportunities increased for both girls and boys around 1750. Pointing to "An Essay on Woman" (1753) as reflecting a shift in view, Woody also claimed that practical education for females had many advocates before the Revolution. Woody's evidence challenges the notion that the Revolution changed attitudes regarding female education, although it may have accelerated earlier trends. Historians' reliance on Kerber's "republican motherhood" thesis may have obscured the presence of these trends, making it difficult to determine to what extent the Revolution really changed women's lives.

题目：

According to the passage, within the field of educational history, Thomas Woody's 1929 work was

选项:

A、innovative because it relied on newspaper advertisements as evidence
B、exceptional in that it concentrated on the period before the American Revolution
C、unusual in that it focused on educational attitudes rather than on educational practices
D、controversial in its claims regarding educational opportunities for boys
E、atypical in that it examined the education of girls

答案:

E
1答疑

[Sentence Correction]

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题目：

A number of linguists contend that all of the thousands of languages spoken by the world's five billion people can be traced back to a common root language.

选项:

A、that all of the thousands of languages spoken by the world's five billion people can be tracedthat the world's five billion people speak thousands of languages of which all can be traced 
B、the world's five billion people speak thousands of languages which are all traceable 
C、all of the thousands of languages spoken by the world's five billion people to be traceable
D、the ability to trace all of the thousands of languages that are spoken by the world's five billion people

答案:

A
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341浏览

[Undefined]

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Art historian: Unlike many artistic traditions that sought to depict plants native to the local area in a seasonally appropriate way (for example, depicting scenes of spring with the plants in the appropriate stages of development for that season), seventeenth-century Dutch artists specializing in flower paintings almost exclusively chose to depict exotic species of flowers from outside the local area. Painting such species was worthwhile primarily because the art-buying public had developed a strong preference for images of the exotic. The great botanical centers of the time gave the artists direct access to such flowers, which the artists would freely combine in a single painting, regardless of whether the combined species occurred together in the wild, and depicted each in full bloom, regardless of whether those species bloomed at the same time in nature.

Statement: The art historian makes the point that the species of flowers these Dutch artists chose to paint were 1 largely because the species were 2 .

Select for 1 and for 2 the options that complete the statement so that it is most strongly supported by the information provided. Make only two selections, one in each column.
我选的CE，和EC有什么区别？怎么选出EC的？
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1300浏览

[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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1480浏览

[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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571浏览

[Undefined]

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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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1324浏览

[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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943浏览

[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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631浏览

[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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640浏览

[Undefined]

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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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151484浏览

[Undefined]

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Analytical!
请问may老师，这题该用什么思路来做？
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158592浏览

[Undefined]

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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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