问答

1答疑

[Reading Comprehension]

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文章：

During the nineteenth century, occupational information about women that was provided by the United States census--a population count conducted each decade--became more detailed and precise in response to social changes.  Through 1840, simple enumeration by household mirrored a home-based agricultural economy and hierarchical social order:  the head of the household (presumed male or absent) was specified by name, whereas other household members were only indicated by the total number of persons counted in various categories, including occupational categories.  Like farms, most enterprises were family-run, so that the census measured economic activity as an attribute of the entire household, rather than of individuals.
 
The 1850 census, partly responding to antislavery and women's rights movements, initiated the collection of specific information about each individual in a household.  Not until 1870 was occupational information analyzed by gender:  the census superintendent reported 1.8 million women employed outside the home in "gainful and reputable occupations." In addition, he arbitrarily attributed to each family one woman "keeping house." Overlap between the two groups was not calculated until 1890, when the rapid entry of women into the paid labor force and social issues arising from industrialization were causing women's advocates and women statisticians to press for more thorough and accurate accounting of women's occupations and wages.

题目：

The primary purpose of the passage is to

选项:

A、explain and critique the methods used by early statisticians
B、compare and contrast a historical situation with a current-day one
C、describe and explain a historical change
D、discuss historical opposition to an established institution
E、trace the origin of a contemporary controversy

答案:

C
1答疑

[Critical Reasoning]

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题目：

Some theorists and critics insist that no aesthetic evaluation of a work of art is sound if it is based even in part on data about the cultural background of the artist. This opinion is clearly false. The only sound aesthetic evaluations of artists’ works are those that take into account factors such as the era and the place of the artists’ births, their upbringing and education, and the values of their societies—in sum, those factors that are part of their cultural background.

The above argument is most vulnerable to which of the following objections?

选项:

A、The argument presupposes the conclusion for which it purports to provide evidence.
B、The argument cites evidence that undermines rather than supports the conclusion.
C、The argument draws its conclusion by means of an equivocal interpretation of key terms.
D、The argument assumes that the production of an effect is evidence of an intention to produce that effect.
E、The argument assumes that evaluative disputes can be resolved by citing factual evidence.

答案:

A
1答疑

[Problem Solving]

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题目：

The difference 942 – 249 is a positive multiple of 7. If a, b, and c are nonzero digits, how many 3-digit numbers abc are possible such that the difference abc – cba is a positive multiple of 7 ?

选项:

A、142
B、71
C、99
D、20
E、18

答案:

E
1答疑

[Data Sufficiency]

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题目：

If f  is the function defined by  for  and  for , what is the value of ?
(1)  
(2)  

选项:

答案:

A
1答疑

[Sentence Correction]

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题目：

Until 1868 and Disraeli, Great Britain had no prime ministers not coming from a landed family.

选项:

A、
A. Until 1868 and Disraeli, Great Britain had no prime ministers not coming
B、
B. Until 1868 and Disraeli, Great Britain had had no prime ministers who have not come
C、
C. Until Disraeli in 1868, there were no prime ministers in Great Britain who have not come
D、
D. It was not until 1868 that Great Britain had a prime minister—Disraeli—who did not come
E、
E. It was only in 1868 and Disraeli that Great Britain had one of its prime ministers not coming

答案:

D
1答疑

[Problem Solving]

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题目：

The average (arithmetic mean) of the 5 positive integers k, m, r, s, and t is 16, and k < m < r < s < t.  If t is 40, what is the greatest possible value of the median of the 5 integers?

选项:

A、16
B、18
C、19
D、20
E、22

答案:

B
1答疑

[Critical Reasoning]

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题目：

Executives at the Fizzles Beverage Company plan to boost profits in Country X on their range of fruit-flavored drinks by introducing new flavors based on tropical fruits that are little known there. The executives reason that since the fruit drinks of other companies have none of these flavors, Fizzles will not have to compete for customers and thus will be able to sell the drinks at a higher price.

Which of the following, if true, presents the most serious potential weakness of the plan?

选项:

A、The new fruit drinks would be priced significantly higher than other Fizzles fruit drinks with more conventional flavors.
B、In a telephone survey, at least one of the consumers contacted said that they preferred many of the new flavors to all of the more familiar flavors.
C、To build widespread demand for the new flavors, Fizzles would have to launch an advertising campaign to familiarize consumers with them.
D、Consumers choosing among fruit-flavored drinks of different brands generally buy on the basis of name recognition and price rather than the specific fruit flavor.
E、Few consumers who are loyal to a specific brand of fruit-flavored drinks would willingly switch to another brand that costs more.

答案:

D
1答疑

[Problem Solving]

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题目：

Two illustrations show arrays of dots. The first illustration shows a 5 by 5 array of dots. The first 3 dots in the second, third, and fourth rows form a 3 by 3 grid, which is enclosed in a square. A text below the illustration reads n equals 5, k equals 3. The second illustration shows a 3 by 3 array of dots. The first dot in the second row is enclosed in a square. A text below the illustration reads n equals 3, k equals 1.

Let n and k be positive integers with k ≤ n. From an n × n array of dots, a k × k array of dots is selected. The figure above shows two examples where the selected k × k array is enclosed in a square. How many pairs (n, k) are possible so that exactly 48 of the dots in the n × n array are NOT in the selected k × k array?

选项:

A、1
B、2
C、3
D、4
E、5

答案:

C
1答疑

[Data Sufficiency]

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题目：

What is the hundredths digit of the decimal z ?
(1) The tenths digit of 100z is 2.
(2) The units digit of 1,000z is 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:

E
1答疑

[Critical Reasoning]

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题目：

Which of the following most logically completes the passage?

Appendicitis (inflammation of the appendix) is potentially fatal; consequently, patients with symptoms strongly suggesting appendicitis almost always have their appendix removed. The appropriate surgery is low-risk but performed unnecessarily in about 20 percent of all cases. A newly developed internal scan for appendicitis is highly accurate, producing two misdiagnoses for every 98 correct diagnoses. Clearly, using this test, doctors can largely avoid unnecessary removals of the appendix without, however, performing any fewer necessary ones than before, since ______.

选项:

A、the patients who are correctly diagnosed with this test as not having appendicitis invariably have medical conditions that are much less serious than appendicitis
B、the misdiagnoses produced by this test are always instances of attributing appendicitis to someone who does not, in fact, have it
C、all of the patients who are diagnosed with this test as having appendicitis do, in fact, have appendicitis
D、every patient who is diagnosed with this test as having appendicitis has more than one of the symptoms generally associated with appendicitis
E、the only patients who are misdiagnosed using this test are patients who lack one or more of the symptoms that are generally associated with appendicitis

答案:

B
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1934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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5025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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5709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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1914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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4136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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2901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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1918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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2004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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427552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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434690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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