问答

1答疑

[Problem Solving]

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题目：

Working simultaneously at their respective constant rates, Machines A and B produce 800 nails in x hours. Working alone at its constant rate, Machine A produces 800 nails in y hours. In terms of x and y, how many hours does it take Machine B, working alone at its constant rate, to produce 800 nails?

选项:

A、 $$\frac{x}{x+y}$$
B、 $$\frac{y}{x+y}$$
C、 $$\frac{xy}{x+y}$$
D、 $$\frac{xy}{x-y}$$
E、 $$\frac{xy}{y-x}$$

答案:

E
1答疑

[Data Sufficiency]

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题目：

The annual rent collected by a corporation from a certain building was x percent more in 1998 than in 1997 and y percent less in 1999 than in 1998. Was the annual rent collected by the corporation from the building more in 1999 than in 1997?

(1)$$x > y$$

(2)$$frac{xy} {100}<{x}-{y}$$

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 statement 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

[Critical Reasoning]

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题目：

A successful coffee stand that serves the workers in a large office building plans to increase its profits by adding oatmeal—a hot cereal popular among the workers—to its menu. The manager says that oatmeal is “the ultimate convenience food” because it can be served by the cup, as coffee is; further, offering oatmeal will enable the stand to get into the breakfast business without making a large investment, because it does not require elaborate cooking equipment.

Which of the following would, if true, most strengthen the likelihood that the manager's plan will achieve its goal?

选项:

A、Some of the office building's businesses have recently begun providing free coffee to their employees.
B、The ingredients needed to make oatmeal are inexpensive and do not spoil easily the way many fresh breakfast foods typically sold at coffee stands do.
C、In order to offer more flexible schedules to their workers, several businesses in the office building will soon be expanding their hours.
D、Supermarket sales of oatmeal and other cereals slowed this year following large gains last year.
E、Oatmeal manufacturers have recently reduced their oatmeal offerings, which had included oatmeal in microwaveable cups and convenient cereal bars made with rolled oats.

答案:

B
1答疑

[Problem Solving]

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题目：

If $${n}={3}^{8}-{2}^{8}$$, which of the following is NOT a factor of n ?

选项:

A、 97
B、 65
C、 35
D、 13
E、 5

答案:

C
1答疑

[Data Sufficiency]

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题目：

Mary persuaded n friends to donate $500 each to her election campaign, and then each of these n friends persuaded n more people to donate $500 each to Mary's campaign.  If no one donated more than once and if there were no other donations, what was the value of n?
(1)     The first n people donated  of the total amount donated.
(2)     The total amount donated was $120,000.

选项:

答案:

D
1答疑

[Problem Solving]

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题目：

If n is a positive integer, which of the following is a possible value of |56 - 5n|?

选项:

A、7
B、9
C、12
D、15
E、20

答案:

B
1答疑

[Problem Solving]

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题目：

 Month Average Price per Dozen

 April

 May

 June

$1.26

$1.20

$1.08

The table above shows the average (arithmetic mean) price per dozen eggs sold in a certain store during three successive months. If as many dozen were sold in April as in May, and twice as many were sold in June as in April, what was the average price per dozen of the eggs sold over the three-month period?

选项:

A、$1.08
B、$1.10
C、$1.14
D、$1.16
E、$1.18

答案:

D
1答疑

[Critical Reasoning]

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题目：

Political theorist: Even with the best spies, area experts, and satellite surveillance, foreign policy assessments can still lack important information. In such circumstances intuitive judgment is vital. A national leader with such judgment can make good decisions about foreign policy even when current information is incomplete, since __________.

Which of the following, if true, most logically completes the argument?

选项:

A、the central reason for failure in foreign policy decision making is the absence of critical information
B、those leaders whose foreign policy decisions have been highly ranked have also been found to have good intuitive judgment
C、both intuitive judgment and good information are required for sound decision making
D、good foreign policy decisions often lead to improved methods of gathering information
E、intuitive judgment can produce good decisions based on past experience, even when there are important gaps in current information

答案:

E
1答疑

[Issue Essay]

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题目：

Read the statement and the instructions that follow it, and then make any notes that will help you plan your response. Begin typing your response in the box at the bottom of the screen.
 
"Businesses and other organizations have overemphasized the importance of working as. a team. Clearly, in any human group, it is the strong individual, the person with the most commitment and energy, who gets things done."
 
Discuss the extent to which you agree or disagree with the opinicn stated above. Support your views with reasons and/or examples from your own experience, observations, or reading.

选项:

答案:

1答疑

[Reading Comprehension]

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文章：

Line Jacob Burckhardt’s view that Renaissance
European women “stood on a footing of perfect
equality” with Renaissance men has been repeatedly
cited by feminist scholars as a prelude to their
(5) presentation of rich historical evidence of women’s
inequality. In striking contrast to Burckhardt, Joan
Kelly in her famous 1977 essay, “Did Women Have
a Renaissance?” argued that the Renaissance was
a period of economic and social decline for women
(10) relative both to Renaissance men and to medieval
women. Recently, however, a significant trend
among feminist scholars has entailed a rejection
of both Kelly’s dark vision of the Renaissance and
Burckhardt’s rosy one. Many recent works by these
(15) scholars stress the ways in which differences
among Renaissance women—especially in terms
of social status and religion—work to complicate
the kinds of generalizations both Burckhardt and
Kelly made on the basis of their observations about
(20) upper-class Italian women.
The trend is also evident, however, in works
focusing on those middle- and upper-class
European women whose ability to write gives them
disproportionate representation in the historical
(25) record. Such women were, simply by virtue of
their literacy, members of a tiny minority of the
population, so it is risky to take their descriptions of
their experiences as typical of “female experience”
in any general sense. Tina Krontiris, for example, in
(30) her fascinating study of six Renaissance women
writers, does tend at times to conflate “women” and
“women writers,” assuming that women’s gender,
irrespective of other social differences, including
literacy, allows us to view women as a homogeneous
(35) social group and make that group an object of
analysis. Nonetheless, Krontiris makes a significant
contribution to the field and is representative of
those authors who offer what might be called a
cautiously optimistic assessment of Renaissance
(40) women’s achievements, although she also stresses
the social obstacles Renaissance women faced
when they sought to raise their “oppositional
voices.” Krontiris is concerned to show women
intentionally negotiating some power for themselves
(45) (at least in the realm of public discourse) against
potentially constraining ideologies, but in her sober
and thoughtful concluding remarks, she suggests
that such verbal opposition to cultural stereotypes
was highly circumscribed; women seldom attacked
(50) the basic assumptions in the ideologies that
oppressed them.

题目：

The last sentence in the passage serves primarily to

选项:

A、suggest that Krontiris’s work is not representative of recent trends among feminist scholars
B、undermine the argument that literate women of the Renaissance sought to oppose social constraints imposed on them
C、show a way in which Krontiris’s work illustrates a “cautiously optimistic” assessment of Renaissance women’s achievements
D、summarize Krontiris’s view of the effect of literacy on the lives of upper- and middle-class Renaissance women
E、illustrate the way in which Krontiris’s study differs from the studies done by Burckhardt and Kelly

答案:

C
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1141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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3250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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3599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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1195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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2745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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1887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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1272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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301836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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308963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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