问答

1答疑

[Data Sufficiency]

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题目：

In planning for a trip, Joan estimated both the distance of the trip, in miles, and her average speed, in miles per hour. She accurately divided her estimated distance by her estimated average speed to obtain an estimate for the time, in hours, that the trip would take. Was her estimate within 0.5 hour of the actual time that the trip took?
  1. Joan's estimate for the distance was within 5 miles of the actual distance.
  2. Joan's estimate for her average speed was within 10 miles per hour of her actual average speed.

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

[Reading Comprehension]

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文章：

Line         Historians remain divided over the role of
  banks in facilitating economic growth in the
  United States in the late eighteenth and early
  nineteenth centuries. Some scholars contend
(5) that banks played a minor role in the nation’s
  growing economy. Financial institutions, they
  argue, appeared only after the economy had
  begun to develop, and once organized, followed
  conservative lending practices, providing aid to
(10) established commercial enterprises but
  shunning those, such as manufacturing and
  transportation projects, that were more
  uncertain and capital-intensive (i.e., requiring
  greater expenditures in the form of capital than in
(15) labor).
       A growing number of historians argue, in
  contrast, that banks were crucial in transforming
  the early national economy. When state
  legislatures began granting more bank charters
(20) in the 1790s and early 1800s, the supply of
  credit rose accordingly. Unlike the earliest banks,
  which had primarily provided short-term loans to
  well-connected merchants, the banks of the early
  nineteenth century issued credit widely. As Paul
(25) Gilje asserts, the expansion and democratization
  of credit in the early nineteenth century became
  the driving force of the American economy, as
  banks began furnishing large amounts of capital
  to transportation and industrial enterprises. The
(30) exception, such historians argue, was in the
  South; here, the overwhelmingly agrarian nature
  of the economy generated outright opposition
  to banks, which were seen as monopolistic
  institutions controlled by an elite group of
(35) planters.


题目：

The passage suggests that Paul Gilje would be most likely to agree with which of the following claims about the lending practices of the “earliest banks” (see line 21)?

选项:

A、These lending practices were unlikely to generate substantial profits for banks.
B、These lending practices only benefited a narrow sector of the economy.
C、The restrictive nature of these lending practices generated significant opposition outside of the South.
D、The restrictive nature of these lending practices forced state legislatures to begin granting more bank charters by the early nineteenth century.
E、These lending practices were likely to be criticized by economic elites as being overly restrictive.

答案:

B
1答疑

[Problem Solving]

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题目：

How many different 6-letter sequences are there that consist of 1 A,2 B's,and3 C's ?

选项:

A、 6
B、 60
C、 120
D、 360
E、 720

答案:

B
1答疑

[Reading Comprehension]

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题目：

Which of the following, if true, would most seriously undermine the author's basis for saying that Wulf overstates Quaker schools' impact?

选项:

A、The information that Wulf herself provided on religious affiliation and gender of students is in fact accurate.
B、Most poor, non-Quaker students enrolled in Quaker schools had completed one or two years' formal or informal schooling before enrolling.
C、Not all of the young women whose commonplace books contained copies of poetry critical of marriage were Quakers.
D、The poetry featured in young women's commonplace books frequently included allusions that were unlikely to be accessible to someone with only three years' study in school.
E、In 1765 an unusually large proportion of the Quaker schools' student body consisted of poor girls from non-Quaker backgrounds.

答案:

B
1答疑

[Problem Solving]

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题目：

For each student in a certain class, a teacher adjusted the student's test score using the formula y = 0.8x + 20, where x is the student's original test score and y is the student's adjusted test score. If the standard deviation of the original test scores of the students in the class was 20, what was the standard deviation of the adjusted test scores of the students in the class?

选项:

A、12
B、16
C、28
D、36
E、40

答案:

B
1答疑

[Problem Solving]

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题目：

If a company allocates 15 percent of its budget to advertising, 10 percent to capital improvements, and 55 percent to salaries, what fraction of its budget remains for other allocations?

选项:

A、4/5
B、3/5
C、3/10
D、1/5
E、1/10

答案:

D
1答疑

[Sentence Correction]

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题目：

According to a recent study of consumer spending on prescription medications, increases in the sales of the 50 drugs that were advertised most heavily accounts for almost half of the $20.8 billion increase in drug spending last year, the remainder of which came from sales of the 9,850 prescription medicines that companies did not advertise or advertised very little.

选项:

A、heavily accounts for almost half of the $20.8 billion increase in drug spending last year, the remainder of which came
B、heavily were what accounted for almost half of the $20.8 billion increase in drug spending last year; the remainder of the increase coming
C、heavily accounted for almost half of the $20.8 billion increase in drug spending last year, the remainder of the increase coming
D、heavily, accounting for almost half of the $20.8 billion increase in drug spending last year, while the remainder of the increase came
E、heavily, which accounted for almost half of the $20.8 billion increase in drug spending last year, with the remainder of it coming

答案:

C
1答疑

[Data Sufficiency]

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题目：

A construction company was paid a total of $500,000 for a construction project.  The company's only costs for the project were for labor and materials.  Was the company's profit for the project greater than $150,000?
(1)     The company's total cost was three times its cost for materials.
(2)     The company's profit was greater than its cost for labor.

选项:

答案:

C
1答疑

[Data Sufficiency]

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题目：

In a certain group of 50 people, how many are doctors who have a law degree?

  1. In the group, 36 people are doctors.
  2. In the group, 18 people have a law degree.

The diagram shows that in total of 50 people; ‘x’ are doctors without a law degree while ‘z’ are law degree holders and are not doctors. One needs to calculate how many are doctors who have law degree (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:

E
1答疑

[Problem Solving]

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题目：

If n = 20! + 17, then n is divisible by which of the following?
  1. 15
  2. 17
  3. 19

选项:

A、None
B、I only
C、II only
D、I and II
E、II and III

答案:

C
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358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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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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1498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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579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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1340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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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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637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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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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153388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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160496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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