[Problem Solving]
试题详情
题目：
In the sequence w, x, y, 30, adding any one of the first three terms to the term immediately following it yields w/2. What is the value of w ?
选项:
A、–60
B、–30
C、0
D、5
E、25
答案:
A
问答
1答疑
1答疑
[Data Sufficiency]
试题详情
题目：
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
[Data Sufficiency]
试题详情
题目：
The tens digit of positive integer X is 3. Is the units digit of X greater than 4?
(1) The units digit of 2X is less than the units digit of X.
(2) The tens digit of 2X is 7.
选项:
答案:
D
1答疑
[Problem Solving]
试题详情
题目：
The infinite sequence a1, a2,…, an,… is such that a1 = 2, a2 = -3, a3 = 5, a4 = -1, and an = an-4 for n > 4. What is the sum of the first 97 terms of the sequence?
慲选项:
A、72
B、74
C、75
D、78
E、80
答案:
B
1答疑
[Reading Comprehension]
试题详情
文章：
题目：
Which of the following statements about the earliest scientific investigators of quantum tunneling can be inferred from the passage?
选项:
A、They found it difficult to increase barrier thickness continually.
B、They anticipated the later results of Chiao and his colleagues.
C、They did not suppose that tunneling particles could travel faster than light.
D、They were unable to observe instances of successful tunneling.
E、They made use of photons to study the phenomenon of tunneling.
答案:
C
1答疑
[Critical Reasoning]
试题详情
文章：
In the year following an eight-cent increase in the federal tax on a pack of cigarettes, sales of cigarettes fell ten percent. In contrast, in the year prior to the tax increase, sales had fallen one percent. The volume of cigarette sales is therefore strongly related to the after-tax price of a pack of cigarettes.
题目：
Which of the following, if true, would most strengthen the argument above?
选项:
A、During the second year after the tax increase, cigarette sales increased by a significant amountThe information available to consumers on the health risks of smoking remained largely unchanged in the period before and after the tax increase.
B、Most consumers were unaware that the tax on cigarettes was going to increase.
C、During the year following the cigarette tax increase, many consumers had less income, in inflation-adjusted dollars, than they had had in the previous year.
D、During the year after the tax increase, there was a greater variety of cigarettes on the market than there had been during the previous year.
答案:
B
1答疑
[Reading Comprehension]
试题详情
文章：
| Line | The argument for “monetizing”—or putting a | |
| monetary value on—ecosystem functions may be | ||
| stated thus: Concern about the depletion of natural | ||
| resources is widespread, but this concern, in the | ||
| (5) | absence of an economic argument for conservation, | |
| has not translated into significant conservational | ||
| progress. Some critics blame this impasse on | ||
| environmentalists, whom they believe fail to address | ||
| the economic issues of environmental degradation. | ||
| (10) | Conservation can appear unprofitable when compared | |
| with the economic returns derived from converting | ||
| natural assets (pristine coastlines, for example) into | ||
| explicitly commercial ones (such as resort hotels). | ||
| But according to David Pearce, that illusion stems | ||
| (15) | from the fact that “services” provided by ecological | |
| systems are not traded on the commodities market, | ||
| and thus have no readily quantifiable value. To | ||
| remedy this, says Pearce, one has to show that all | ||
| ecosystems have economic value—indeed, that all | ||
| (20) | ecological services are economic services. Tourists | |
| visiting wildlife preserves, for example, create | ||
| jobs and generate income for national economies; | ||
| undisturbed forests and wetlands regulate water | ||
| runoff and act as water-purifying systems, saving | ||
| (25) | millions of dollars worth of damage to property | |
| and to marine ecosystems. In Gretchen Daily’s | ||
| view, monetization, while unpopular with many | ||
| environmentalists, reflects the dominant role that | ||
| economic considerations play in human behavior, | ||
| (30) | and the expression of economic value in a common | |
| currency helps inform environmental decision-making | ||
| processes. |
题目：
Which of the following can be inferred from the passage concerning the environmentalists mentioned in line 8?
选项:
A、 later in the United States House of Representatives, not until Barbara Jordan’s participation in the hearings on the impeachment of President Richard Nixon in 1974 was she made a nationally recognized figure, as it was
B、later in the United States House of Representatives, Barbara Jordan did not become a nationally recognized figure until 1974, when she participated in the hearings on the impeachment of President Richard Nixon, which were
C、later in the United States House of Representatives, it was not until 1974 that Barbara Jordan became a nationally recognized figure, with her participation in the hearings on the impeachment of President Richard Nixon, which was
D、 then also later in the United States House of Representatives, not until 1974 did Barbara Jordan become a nationally recognized figure, as she participated in the hearings on the impeachment of President Richard Nixon, being
E、then also later in the United States House of Representatives, Barbara Jordan did not become a nationally recognized figure until 1974, when she participated in the hearings on the impeachment of President Richard Nixon, which was
答案:
C
1答疑
[Sentence Correction]
试题详情
题目：
Tides typically range from three to six feet, but while some places show no tides at all, some others, such as the Bay of Fundy, have tides of at least thirty feet and more.
选项:
答案:
C
1答疑
[Critical Reasoning]
试题详情
题目：
An experiment was done in which human subjects recognize a pattern within a matrix of abstract designs and then select another design that completes that pattern. The results of the experiment were surprising. The lowest expenditure of energy in neurons in the brain was found in those subjects who performed most successfully in the experiments.
Which of the following hypotheses best accounts for the findings of the experiment?
Which of the following hypotheses best accounts for the findings of the experiment?
选项:
A、The neurons of the brain react less when a subject is trying to recognize patterns than when the subject is doing other kinds of reasoning.
B、Those who performed best in the experiment experienced more satisfaction when working with abstract patterns than did those who performed less well.
C、People who are better at abstract pattern recognition have more energy-efficient neural connections.
D、The energy expenditure of the subjects’ brains increases when a design that completes the initially recognized pattern is determined.
E、The task of completing a given design is more capably performed by athletes, whose energy expenditure is lower when they are at rest.
答案:
C
1答疑
[Reading Comprehension]
试题详情
文章：
题目：
The passage suggests that Buel and Buel's biography of Mary Fish provides evidence for which of the following views of women's history?
选项:
A、Women have lost power in relation to men since the colonial era.
B、Women of the colonial era were not as likely to be concerned with their status as were women in the nineteenth century.
C、The colonial era was not as favorable for women as some historians have believed.
D、Women had more economic autonomy in the colonial era than in the nineteenth century.
E、Women's occupations were generally more respected in the colonial era than in the nineteenth century.
答案:
C
0评分
1156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
3292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
3642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
1212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
2778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
1903浏览
0评分
1221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
1287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
304702浏览
0评分
311828浏览
