问答

1答疑

[Sentence Correction]

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题目：

Many utilities obtain most of their electric power from large coal and nuclear operations at costs that are sometimes two to three times higher as that of power from smaller, more efficient plants that can both make use of waste heat and take advantage of the current abundance of natural gas.

选项:

A、two to three times higher as that of power from smaller, more efficient plants that can both
B、higher by two to three times as that from smaller, more efficient plants that both can
C、two to three times higher than those for power from smaller, more efficient plants that can both
D、between two to three times higher as those for power from smaller, more efficient plants that both can
E、between two to three times higher than from smaller, more efficient plants that they can both

答案:

C
1答疑

[Reading Comprehension]

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文章：

Line         When Jamaican-born social activist Marcus
  Garvey came to the United States in 1916, he
  arrived at precisely the right historical moment.
  What made the moment right was the return of
(5) African American soldiers from the First World War
  in 1918, which created an ideal constituency for
  someone with Garvey’s message of unity, pride,
  and improved conditions for African American
  communities.
(10)      Hoping to participate in the traditional American
  ethos of individual success, many African American
  people entered the armed forces with enthusiasm,
  only to find themselves segregated from white
  troops and subjected to numerous indignities. They
(15) returned to a United States that was as segregated
  as it had been before the war. Considering similar
  experiences, anthropologist Anthony F. C. Wallace
  has argued that when a perceptible gap arises
  between a culture’s expectations and the reality of
(20) that culture, the resulting tension can inspire a
  revitalization movement: an organized, conscious
  effort to construct a culture that fulfills longstanding
  expectations.
       Some scholars have argued that Garvey created
(25) the consciousness from which he built, in the 1920s,
  the largest revitalization movement in
  African American history. But such an argument only
  tends to obscure the consciousness of
  identity, strength, and sense of history that already
(30) existed in the African American community. Garvey
  did not create this consciousness; rather, he gave
  this consciousness its political expression.


题目：

According to the passage, many African American people joined the armed forces during the First World War for which of the following reasons?

选项:

A、They wished to escape worsening economic conditions in African American communities.
B、They expected to fulfill ideals of personal attainment.
C、They sought to express their loyalty to the United States.
D、They hoped that joining the military would help advance the cause of desegregation.
E、They saw military service as an opportunity to fulfill Marcus Garvey’s political vision.

答案:

B
1答疑

[Reading Comprehension]

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文章：

    Is it possible to decrease inflation without causing a recession and its concomitant increase in unemployment? The orthodox answer is "no." whether they support the "inertia" theory of inflation (that today's inflation rate is caused by yesterday's infla tion, the state of the economic cycle, and external influences such as import prices) or the "rational expectations" theory (that inflation is caused by workers' and employers' expectations, coupled with a lack of credible monetary and fiscal policies), most economists agree that tight monetary and fiscal policies, which cause recessions, are necessary to decelerate inflation. They point out that in the 1980's, many European countries and the United States conquered high (by these countries' standards) inflation, but only by applying tight monetary and fiscal policies that sharply increased unemployment. Nevertheless, some governments' policymakers insist that direct controls on wages and prices, without tight monetary and fiscal policies, can succeed in decreasing inflation. Unfortunately, because this approach fails to deal with the underlying causes of inflation, wage and price controls eventually collapse, the hitherto-repressed inflation resurfaces, and in the meantime, though the policymakers succeed in avoiding a recession, a frozen structure of relative prices imposes distortions that do damage to the economy's prospects for longterm growth.

题目：

The primary purpose of the passage is to

选项:

A、apply two conventional theories.
B、examine a generally accepted position
C、support a controversial policy
D、explain the underlying causes of a phenomenon
E、propose an innovative solution

答案:

B
1答疑

[Data Sufficiency]

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题目：

On the number line, point R has coordinate r and point T has coordinate t. Is t < 0 ?
  1. –1 < r < 0
  2. The distance between R and T is equal to r 2.

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

[Critical Reasoning]

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文章：

In a certain wildlife park, park rangers are able to track the movements of many rhinoceroses because those animals wear radio collars. When, as often happens, a collar slips off, it is put back on. Putting a collar on a rhinoceros involves immobilizing the animal by shooting it with a tranquilizer dart. Female rhinoceroses that have been frequently recollared have significantly lower fertility rates than uncollared females. Probably, therefore, some substance in the tranquilizer inhibits fertility.

题目：

In evaluating the argument, it would be most useful to determine which of the following?

选项:

A、Whether there are more collared female rhinoceroses than uncollared female rhinoceroses in the parkHow the tranquilizer that is used for immobilizing rhinoceroses differs, if at all, from tranquilizers used in working with other large mammals 
B、How often park rangers need to use tranquilizer darts to immobilize rhinoceroses for reasons other than attaching radio collars 
C、Whether male rhinoceroses in the wildlife park lose their collars any more often than the park's female rhinoceroses do 
D、Whether radio collars are the only practical means that park rangers have for tracking the movements of rhinoceroses in the park 

答案:

C
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[Data Sufficiency]

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题目：

In the first 2 hours after Meadow’s self-service laundry opens, m large washing machines and n small washing machines are in continual use. Including the time for filling and emptying the washing machines, each load of laundry takes 30 minutes in a large washing machine and 20 minutes in a small washing machine. What is the total number of loads of laundry done at Meadow’s self-service laundry during this 2-hour period?
  1. n = 3m
  2. 2m + 3n = 55

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:

B
1答疑

[Data Sufficiency]

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题目：

What is the median number of employees assigned per project for the projects at Company Z?
(1)   25 percent of the projects at Company Z have 4 or more employees assigned to each project.
(2) 35 percent of the projects at Company Z have 2 or fewer employees assigned to each project.
                  

选项:

答案:

C
1答疑

[Critical Reasoning]

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文章：

Scientists have modified feed corn genetically, increasing its resistance to insect pests. Farmers who tried out the genetically modified corn last season applied less insecticide to their corn fields and still got yields comparable to those they would have gotten with ordinary corn. Ordinary corn seed, however, costs less, and what these farmers saved on insecticide rarely exceeded their extra costs for seed. Therefore, for most feed-corn farmers, switching to genetically modified seed would be unlikely to increase profits.

题目：

Which of the following would it be most useful to know in order to evaluate the argument?

选项:

A、Whether there are insect pests that sometimes reduce feed-corn yields, but against which commonly used insecticides and the genetic modifi cation are equally ineffectiveWhether the price that farmers receive for feed corn has remained steady over the past few years 
B、Whether the insecticides typically used on feed corn tend to be more expensive than insecticides typically used on other crops
C、Whether most of the farmers who tried the genetically modifi ed corn last season applied more insecticide than was actually necessary
D、Whether, for most farmers who plant feed corn, it is their most profi table crop 

答案:

D
1答疑

[Sentence Correction]

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题目：

Written early in the French Revolution, Mary Wollstonecraft&#146;s A Vindication of the Rights of Man (1790) and A Vindication of the Rights of Woman (1792) attributed Europe&#146;s social and political ills to be the result of the dominance of aristocratic values and patriarchal hereditary privilege.

选项:

A、Mary Wollstonecraft’s A Vindication of the Rights of Man (1790) and A Vindication of the Rights of Woman (1792) attributed Europe’s social and political ills to be the result of
B、Mary Wollstonecraft’s A Vindication of the Rights of Man (1790) and A Vindication of the Rights of Woman (1792) attributed Europe’s social and political ills to result from
C、Mary Wollstonecraft’s A Vindication of the Rights of Man (1790) and A Vindication of the Rights of Woman (1792) attributed Europe’s social and political ills to
D、in A Vindication of the Rights of Man (1790) and A Vindication of the Rights of Woman (1792), Mary Wollstonecraft attributed Europe’s social and political ills to have been the result of
E、Mary Wollstonecraft, in A Vindication of the Rights of Man (1790) and A Vindication of the Rights of Woman (1792), attributed Europe’s social and political ills to

答案:

C
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
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[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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1321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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[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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[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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[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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953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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[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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651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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[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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[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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