[Data Sufficiency]
试题详情
题目：
If x(x - 5)(x + 2) = 0, is x negative?
(1) x2- 7x ≠ 0
(2) x2-2x -15 ≠ 0
ⰾ选项:
答案:
C
问答
2答疑
2答疑
[Data Sufficiency]
试题详情
题目：
During a 10-week summer vacation, was the average (arithmetic mean) number of books that Carolyn read per week greater than the average number of books that Jacob read per week?
(1) Twice the average number of books that Carolyn read per week was greater than 5 less than twice the average number of books that Jacob read per week.
(2) During the last 5 weeks of the vacation, Carolyn read a total of 3 books more than Jacob.
选项:
答案:
E
2答疑
[Sentence Correction]
试题详情
题目：
Of all the vast tides of migration that have swept through history, maybe none is more concentrated as the wave that brought 12 million immigrants onto American shores in little more than three decades.
选项:
A、maybe none is more concentrated as
B、it may be that none is more concentrated as
C、perhaps it is none that is more concentrated than
D、maybe it is none that was more concentrated than
E、perhaps none was more concentrated than
答案:
E
2答疑
[Sentence Correction]
试题详情
题目：
Despite its covering the entire planet, Earth has a crust that is not seamless or stationary, rather it is fragmented into mobile semirigid plates.
选项:
A、Despite its covering the entire planet, Earth has a crust that is not seamless or stationary, rather it is
B、Despite the fact that it covers the entire planet, Earth’s crust is neither seamless nor is it stationary, but is
C、Despite covering the entire planet, Earth’s crust is neither seamless nor is it stationary, but rather
D、Although it covers the entire planet, Earth’s crust is neither seamless nor stationary, but rather
E、Although covering the entire planet, Earth has a crust that is not seamless or stationary, but
答案:
D
2答疑
[Critical Reasoning]
试题详情
题目：
When hypnotized subjects are told that they are deaf and are then asked whether they can hear the hypnotist, they reply, "No." Some theorists try to explain this result by arguing that the selves of hypnotized subjects are dissociated into separate parts, and that the part that is deaf is dissociated from the part that replies.
Which of the following challenges indicates the most serious weakness in the attempted explanation described above?
Which of the following challenges indicates the most serious weakness in the attempted explanation described above?
选项:
A、Why does the part that replies not answer, 'Yes'?
B、Why are the observed facts in need of any special explanation?
C、Why do the subjects appear to accept the hypnotist's suggestion that they are deaf?
D、Why do hypnotized subjects all respond the same way in the situation described?
E、Why are the separate parts of the self the same for all subjects?
答案:
A
2答疑
[Reading Comprehension]
试题详情
文章：
| Line | During the 1980s, many economic historians |
| studying Latin America focused on the impact of | |
| the Great Depression of the 1930s. Most of these | |
| historians argued that although the Depression | |
| (5) | began earlier in Latin America than in the United |
| States, it was less severe in Latin America and did | |
| not significantly impede industrial growth there. | |
| The historians’ argument was grounded in national | |
| government records concerning tax revenues and | |
| (10) | exports and in government-sponsored industrial |
| censuses, from which historians have drawn | |
| conclusions about total manufacturing output | |
| and profit levels across Latin America. However, | |
| economic statistics published by Latin American | |
| (15) | governments in the early twentieth century are |
| neither reliable nor consistent; this is especially | |
| true of manufacturing data, which were gathered | |
| from factory owners for taxation purposes and | |
| which therefore may well be distorted. Moreover, | |
| (20) | one cannot assume a direct correlation between |
| the output level and the profit level of a given | |
| industry as these variables often move in opposite | |
| directions. Finally, national and regional economies | |
| are composed of individual firms and industries, | |
| (25) | and relying on general, sweeping economic |
| indicators may mask substantial variations among | |
| these different enterprises. For example, recent | |
| analyses of previously unexamined data on textile | |
| manufacturing in Brazil and Mexico suggest that the | |
| (30) | Great Depression had a more severe impact on this |
| Latin American industry than scholars | |
| had recognized. |
题目：
Which of the following conclusions about the Great Depression is best supported by the passage?
选项:
A、It did not impede Latin American industrial growth as much as historians had previously thought.
B、It had a more severe impact on the Brazilian and the Mexican textile industries than it had on Latin America as a region.
C、It affected the Latin American textile industry more severely than it did any other industry in Latin America.
D、The overall impact on Latin American industrial growth should be reevaluated by economic historians.
E、Its impact on Latin America should not be compared with its impact on the United States.
答案:
D
2答疑
[Critical Reasoning]
试题详情
题目：
During the earliest period of industrialization in Britain, steam engines were more expensive to build and operate than either windmills or water mills, the other practicable sources of power for factories. Yet despite their significant cost disadvantage, steam-powered factories were built in large numbers well before technical improvements brought their cost down. Furthermore, they were built even in regions where geographical conditions permitted the construction of wind- and water-powered factories close to major markets.
Which of the following, if true, most helps to explain the proliferation of steam-powered factories during the earliest period of industrialization in Britain?
Which of the following, if true, most helps to explain the proliferation of steam-powered factories during the earliest period of industrialization in Britain?
选项:
A、In many areas of Britain, there were fewer steam-powered factories than wind- or water-powered factories in the earliest period of industrialization.
B、Unlike wind- or water-powered factories, steam-powered factories were fueled with coal, which sometimes had to be transported significant distances from the mine to the site of the factory.
C、It was both difficult and expensive to convert a factory from wind power or water power to steam power.
D、In the early period of industrialization, many goods sold in towns and cities could not be mass-produced in factories.
E、In Britain, the number of sites where a wind- or water-powered factory could be built was insufficient to provide for all of the demand for factory-produced goods at the time.
答案:
E
2答疑
[Sentence Correction]
试题详情
题目：
When the temperature of a gas is increased, it is either accompanied by an increase in pressure if the gas is enclosed in a container, or an increase in volume if the gas is able to expand.
选项:
A、 When the temperature of a gas is increased, it is either accompanied by an increase in pressure if the gas is enclosed in a container, or
B、 When the temperature of a gas is increased, it is accompanied either by an increase in pressure if it is enclosed in a container or
C、 When the temperature of a gas is increased, the increase is either accompanied by an increase in pressure if the gas is enclosed in a container or by
D、 Any increase in the temperature of a gas is either accompanied by an increase in pressure if it is enclosed in a container, or by
E、 Any increase in the temperature of a gas is accompanied either by an increase in pressure if the gas is enclosed in a container or by
答案:
E
2答疑
[Sentence Correction]
试题详情
题目：
The use of the bar code, or Universal Product Code, which was created in part to enable supermarkets to process customers at a faster rate, has expanded beyond supermarkets to other retail outlets and have become readily accepted despite some initial opposition when it was first introduced in 1974.
选项:
A、have become readily accepted despite some initial opposition when it was first introduced in 1974
B、has become readily accepted despite some initial opposition when they were first introduced in 1974
C、have become readily accepted despite some initial opposition when first introduced in 1974
D、has become readily accepted despite some initial opposition when the bar code was first introduced in 1974
E、bar codes have become readily accepted despite some initial opposition when it was first introduced in 1974
答案:
D
2答疑
[Critical Reasoning]
试题详情
题目：
Archaeologists use technology to analyze ancient sites. It is likely that this technology will advance considerably in the near future, allowing archaeologists to gather more information than is currently possible. If they study certain sites now, they risk contaminating or compromising them for future studies. Therefore, in order to maximize the potential for gathering knowledge in the long run, a team of archaeologists plans to delay the examination of a newly excavated site.
Which of the following would be most useful to investigate for the purpose of evaluating the plan’s prospects for achieving its goal?
Which of the following would be most useful to investigate for the purpose of evaluating the plan’s prospects for achieving its goal?
选项:
答案:
A
0评分
1288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
3637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
4016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
1336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
2994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
2075浏览
0评分
1332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
1402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
330944浏览
0评分
338070浏览
