[Data Sufficiency]
试题详情
题目：
If x and y are positive, is 3x > 7y?
(1) x > y + 4
(2) -5x < -14y
选项:
答案:
B
问答
1答疑
1答疑
[Data Sufficiency]
试题详情
题目：
(n-x) + (n-y) + (n-c) + (n-k)
What is the value of the expression above?
(1) The average (arithmetic mean) of x, y, c, and k is n.
(2) x, y, c, and k are consecutive integers.
选项:
答案:
A
1答疑
[Problem Solving]
试题详情
题目：
If x, y, and k are positive numbers such that (
)(20) = k and if x < y, which of the following could be the value of k ?
选项:
A、10
B、12
C、15
D、18
E、30
答案:
D
1答疑
[Sentence Correction]
试题详情
题目：
When Nigeria achieved full independence in 1960, they had already established a federal political structure consisting of three regions based on the three major population clusters that were in its borders.
选项:
A、 they had already established a federal political structure consisting of three regions based on the three major population clusters that were in
B、 they already had established a federal political structure consisting of three regions that was based on the three major population clusters inside
C、 they already had established a federal political structure that consisted of three regions based on the three major population clusters in
D、 it had already established a federal political structure that consisted of three regions based on the three major population clusters within
E、 it already had established a federal political structure consisting of three regions being based on the three major population clusters it had within
答案:
D
1答疑
[Reading Comprehension]
试题详情
文章：
Years before the advent of plate tectonics―the widely accepted theory, developed in the mid-1960's, the holds that the major features of Earth's surface are created by the horizontal motions of Earth's outer shell, or lithosphere a similar theory was rejected by the geological community. In 1912, Alfred Wegener proposed, in a widely debate theory that came to be called continental drift, that Earth's continents were mobile. To most geologists today, Wegener's The origin of Continents and Oceans appears an impressive and prescient document, containing several of the essential presumptions underlying plate tectonics theory: the horizontal mobility of pieces of Earth's crust; the essential difference between oceanic and conti nental crust; and a causal connection between horizontal displacements and the formation of mountain chains. Yet despite the considerable overlap between Wegener's concepts and the later widely embraced plate tectonics theory, and despite the fact that continental drift theory presented a possible solution to the problem of the origin of mountains at a time when existing explanations were seriously in doubt, in its day Wegener's theory was rejected by the vast majority of geologists.
Most geologists and many historians today believe that Wegener's theory was rejected because of its lack of an adequate mechanical basis. Stephen Jay Gould, for example, argues that continental drift theory was rejected because it did not explain how continent could move through an apparently solid oceanic floor. However, as Anthony Hallam has pointed out, many scientific phenomena, such as the ice ages, have been accepted before they could be fully explained. The most likely cause for the rejection of continental drift―a cause that has been largely ignored because we consider Wegener's theory to have been validated by the theory of plate tectonics―is the nature of the evidence that was put forward to support it. Most of Wegener's evidence consisted of homologies-similarities of patterns and forms based on direct observations of rocks in the field, supported by the use of hammers, hand lenses, and field notebooks. In contrast, the data supporting plate tectonics were impressively geophysical-instrumental determinations of the physical properties of Earth garnered through the use of seismographs, magnetometers, and computers.
Most geologists and many historians today believe that Wegener's theory was rejected because of its lack of an adequate mechanical basis. Stephen Jay Gould, for example, argues that continental drift theory was rejected because it did not explain how continent could move through an apparently solid oceanic floor. However, as Anthony Hallam has pointed out, many scientific phenomena, such as the ice ages, have been accepted before they could be fully explained. The most likely cause for the rejection of continental drift―a cause that has been largely ignored because we consider Wegener's theory to have been validated by the theory of plate tectonics―is the nature of the evidence that was put forward to support it. Most of Wegener's evidence consisted of homologies-similarities of patterns and forms based on direct observations of rocks in the field, supported by the use of hammers, hand lenses, and field notebooks. In contrast, the data supporting plate tectonics were impressively geophysical-instrumental determinations of the physical properties of Earth garnered through the use of seismographs, magnetometers, and computers.
题目：
The author of the passage suggests that the most likely explanation for the geological community's response to continental drift theory in its day was that the theory
选项:
A、was in conflict with certain aspects of plate tectonics theory
B、failed to account for how mountains were formed
C、did not adequately explain how continents moved through the ocean floor
D、was contradicted by the geophysical data of the time
E、was based on a kind of evidence that was considered insufficiently convincing
答案:
E
1答疑
[Critical Reasoning]
试题详情
题目：
In the country of Veltria, the past two years' broad economic recession has included a business downturn in the clothing trade, where sales are down by about 7 percent as compared to two years ago. Clothing wholesalers have found, however, that the proportion of credit extended to retailers that was paid off on time fell sharply in the first year of the recession but returned to its prerecession level in the second year.
Which of the following, if true, most helps to explain the change between the first and the second year of the recession in the proportion of credit not paid off on time?
Which of the following, if true, most helps to explain the change between the first and the second year of the recession in the proportion of credit not paid off on time?
选项:
A、The total amount of credit extended to retailers by clothing wholesalers increased between the first year of the recession and the second year.
B、Between the first and second years of the recession, clothing retailers in Veltria saw many of their costs, rent and utilities in particular, increase.
C、Of the considerable number of clothing retailers in Veltria who were having financial difficulties before the start of the recession, virtually all were forced to go out of business during its first year.
D、Clothing retailers in Veltria attempted to stimulate sales in the second year of the recession by discounting merchandise.
E、Relatively recession-proof segments of the clothing trade, such as work clothes, did not suffer any decrease in sales during the first year of the recession.
答案:
C
1答疑
[Critical Reasoning]
试题详情
题目：
A manufacturer can only recoup its retooling costs for redesigning a product if it sells enough of the product to its distributors to pass its break-even point. Unless retail companies believe the product will sell well, however, they will not buy enough of the product from distributors to enable the manufacturer to recoup its costs. Manufacturers are more likely to retool products if the products have scored favorably in market studies or if large advance orders for the redesigned products have come in before the retooling process is started, or both.
Of the following selections, which one can be appropriately inferred from the above passage?
Of the following selections, which one can be appropriately inferred from the above passage?
选项:
A、A. If a manufacturer receives large advance orders for the redesigned product from its distributors, it will recoup its retooling costs.
B、B. Retail companies that stock products based on favorable market studies will sell a lot of products.
C、C. A manufacturer that has recouped its retooling costs has sold enough of the redesigned product to pass its break-even point.
D、D. A manufacturer that did not get many advance orders for a redesigned product did not make a profit.
E、E. A manufacturer that had enough sales of a redesigned product to pass its break-even point by a wide margin did not make a profit on its sale of the product.
答案:
C
1答疑
[Reading Comprehension]
试题详情
文章：
The premise with which the multiculturalists begin is unexceptional: that it is important to recognize and to celebrate the wide range of cultures that exist in the United States. In what sounds like a reflection of traditional American pluralism, the multiculturalists argue that we must recognize difference, that difference is legitimate; in its kindlier versions, multiculturalism represents the discovery on the part of minority groups that they can play a part in molding the larger culture even as they are molded by it. And on the campus multiculturalism, defined more locally as the need to recognize cultural variations among students, has tried with some success to talk about how a racially and ethnically diverse student body can enrich everyone’s education.
Phillip Green, a political scientist at Smith and a thoughtful proponent of multiculturalism, notes that for a significant portion of the students the politics of identity is all-consuming. Students he says "are unhappy with the thin gruel of rationalism. They require a therapeutic curriculum to overcome not straightforward racism but ignorant stereotyping."
(1) But multiculturalism’s hard-liners, who seem to make up the majority of the movement, damn as racism any attempt to draw the myriad of American groups into a common American culture. For these multiculturalists, differences are absolute, irreducible, intractable—occasions not for understanding but for separation. The multiculturalist, it turns out, is not especially interested in the great American hyphen, in the syncretistic (and therefore naturally tolerant) identities that allow Americans to belong to more than a single culture, to be both particularists and universalists.
The time-honored American mixture of assimilation and traditional allegiance is denounced as a danger to racial and gender authenticity. This is an extraordinary reversal of the traditional liberal commitment to a "truth" that transcends parochialisms. In the new race/class/gender formation, universality is replaced by, among other things, feminist science Nubian numerals (as part of an Afro-centric science), and what Marilyn Frankenstein of the University of Massachusetts-Boston describes as "ethno-mathematics," in which the cultural basis of counting comes to the fore.
The multiculturalists insist on seeing all perspectives as tainted by the perceiver’s particular point of view. Impartial knowledge, they argue, is not possible, because ideas are simply the expression of individual identity, or of the unspoken but inescapable assumptions that are inscribed in a culture or a language. The problem, (2) however, with this warmed-over Nietzscheanism is that it threatens to leave no ground for anybody to stand on. So the multi-culturalists make a leap, necessary for their own intellectual survival, and proceed to argue that there are some categories, such as race and gender, that do in fact embody an unmistakable knowledge of oppression. Victims are at least epistemologically lucky. Objectivity is a mask for oppression. And so an appalled former 1960s radical complained to me that self-proclaimed witches were teaching classes on witchcraft. "They’re not teaching students how to think," she said, "they’re telling them what to believe."
题目：
"Multiculturalist relativism" is the notion that there is no such thing as impartial or objective knowledge. The author seems to be grounding his criticism of this notion on
选项:
A、A. the clear evidence that science has indeed discovered "truths" that have been independent of both language and culture.
B、B. the conclusion that relativism leaves one with no clear notions of any one thing that is true.
C、C. the absurdity of claiming that knowledge of oppression is more valid than knowledge of scientific facts.
D、D. the agreement among peoples of all cultures as to certain undeniable truths—e.g., when the sky is clear, day is warmer than night.
E、E. the fact that "truth" is not finitely definable and therefore that any discussion of impartial or objective truth is moot.
答案:
B
1答疑
[Problem Solving]
试题详情
题目：
The symbol Θ denotes one of the operations: addition, subtraction, multiplication, or division. What is the value of ?
(1) 1Θ1 = 1
(2) 0Θ0 = 0
(1) 1Θ1 = 1
(2) 0Θ0 = 0
选项:
A、A. if statement (1) ALONE is sufficient to answer the question but statement (2) alone is not sufficient;
B、B. if statement (2) ALONE is sufficient to answer the question but statement (1) alone is not sufficient;
C、C. if the two statements TAKEN TOGETHER are sufficient to answer the question, but NEITHER statement ALONE is sufficient;
D、D. if EACH statement ALONE is sufficient to answer the question;
E、E. if the two statements TAKEN TOGETHER are still NOT sufficient to answer the question
答案:
C
1答疑
[Critical Reasoning]
试题详情
题目：
Astronomer: Most stars are born in groups of thousands, each star in a group forming from the same parent cloud of gas. Each cloud has a unique, homogeneous chemical composition. Therefore, whenever two stars have the same chemical composition as each other, they must have originated from the same cloud of gas.
Which of the following, if true, would most strengthen the astronomer’s argument?
Which of the following, if true, would most strengthen the astronomer’s argument?
选项:
A、In some groups of stars, not every star originated from the same parent cloud of gas.
B、Clouds of gas of similar or identical chemical composition may be remote from each other.
C、Whenever a star forms, it inherits the chemical composition of its parent cloud of gas.
D、Many stars in vastly different parts of the universe are quite similar in their chemical compositions.
E、Astronomers can at least sometimes precisely determine whether a star has the same chemical composition as its parent cloud of gas.
答案:
C
0评分
1145浏览
[Undefined]
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.
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？
0评分
3265浏览
[Undefined]
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
0评分
3617浏览
[Undefined]
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
0评分
1201浏览
[Undefined]
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？
0评分
2755浏览
[GWD]
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
0评分
1896浏览
0评分
1215浏览
[Undefined]
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
0评分
1275浏览
[Undefined]
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
0评分
302893浏览
0评分
310020浏览
