[Data Sufficiency]
试题详情
题目：
Is │x│=│y│?
(1) x - y = 6
(2) x + y = 0
fܸ*选项:
答案:
B
问答
1答疑
1答疑
[Data Sufficiency]
试题详情
题目：
If k and ℓ are lines in the xy-plane, is the slope of k less than the slope of ℓ ?
- The x-intercept of line k is positive, and the x-intercept of line ℓ is negative.
- Lines k and ℓ intersect on the positive y-axis.
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
[Problem Solving]
试题详情
题目：
A certain brand of house paint must be purchased either in quarts at $12 each or in gallons at $18 each. A painter needs a 3-gallon mixture of the paint consisting of 3 parts blue and 2 parts white. What is the least amount of money needed to purchase sufficient quantities of the two colors to make the mixture?
(4 quarts = 1 gallon)
选项:
A、$54
B、$60
C、$66
D、$90
E、$144
答案:
C
1答疑
[Critical Reasoning]
试题详情
题目：
Which of the following most logically completes the argument below?
When mercury-vapor streetlights are used in areas inhabited by insect-eating bats, the bats feed almost exclusively around the lights, because the lights attract flying insects. In Greenville, the mercury-vapor streetlights are about to be replaced with energy-saving sodium streetlights, which do not attract insects. This change is likely to result in a drop in the population of insect-eating bats in Greenville, since __________.
选项:
A、
A. the bats do not begin to hunt until after sundown
B、
B. the bats are unlikely to feed on insects that do not fly
C、
C. the highway department will be able to replace mercury-vapor streetlights with sodium streetlights within a relatively short time and without disrupting the continuity of lighting at the locations of the streetlights
D、
D. in the absence of local concentrations of the flying insects on which bats feed, the bats expend much more energy on hunting for food, requiring much larger quantities of insects to sustain each bat
E、
E. bats use echolocation to catch insects and therefore gain no advantage from the fact that insects flying in the vicinity of streetlights are visible at night
答案:
D
1答疑
[Sentence Correction]
试题详情
题目：
As a result of record low temperatures, the water pipes on the third floor froze, which caused the heads of the sprinkler system to burst, which released torrents of water into offices on the second floor.
选项:
A、which caused the heads of the sprinkler system to burst, which released torrents of water
B、which caused the heads of the sprinkler system to burst and which released torrents of water
C、which caused the heads of the sprinkler system to burst, torrents of water were then released
D、causing the heads of the sprinkler system to burst, then releasing torrents of water
E、causing the heads of the sprinkler system to burst and release torrents of water
答案:
E
1答疑
[Data Sufficiency]
试题详情
题目：
Alan and Sue have each been saving one dollar a day and will continue to do so for the next month. If Sue began saving several days before Alan, in how many days from today will Alan have saved one-half as much as Sue?
- As of today, Alan has saved 7 dollars and Sue has saved 27 dollars.
- Three days from today, Alan will have saved one-third as much as Sue.
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:
A
1答疑
[Reading Comprehension]
试题详情
文章：
| Line | Micro-wear patterns found on the teeth of long- |
| extinct specimens of the primate species | |
| australopithecine may provide evidence about their | |
| diets. For example, on the basis of tooth micro-wear | |
| (5) | patterns, Walker dismisses Jolly’s hypothesis that |
| australopithecines ate hard seeds. He also disputes | |
| Szalay’s suggestion that the heavy enamel of | |
| australopithecine teeth is an adaptation to bone | |
| crunching, since both seed cracking and bone | |
| (10) | crunching produce distinctive micro-wear |
| characteristics on teeth. His conclusion that | |
| australopithecines were frugivores (fruit eaters) is | |
| based upon his observation that the tooth micro- | |
| wear characteristics of east African | |
| (15) | australopithecine specimens are indistinguishable |
| from those of chimpanzees and orangutans, which | |
| are commonly assumed to be frugivorous primates. | |
| However, research on the diets of | |
| contemporary primates suggests that micro-wear | |
| (20) | studies may have limited utility in determining the |
| foods that are actually eaten. For example, insect | |
| eating, which can cause distinct micro-wear | |
| patterns, would not cause much tooth abrasion in | |
| modern baboons, who eat only soft-bodied insects | |
| (25) | rather than hard-bodied insects. In addition, the |
| diets of current omnivorous primates vary | |
| considerably depending on the environments that | |
| different groups within a primate species inhabit; if | |
| australopithecines were omnivores too, we might | |
| (30) | expect to find considerable population variation in |
| their tooth micro-wear patterns. Thus, Walker’s | |
| description of possible australopithecine diets may | |
| need to be expanded to include a much more | |
| diverse diet. |
题目：
The passage suggests that which of the following would be true of studies of tooth micro-wear patterns conducted on modern baboons?
选项:
A、
They would inaccurately suggest that some baboons eat more soft-bodied than hard-bodied insects.
B、
They would suggest that insects constitute the largest part of some baboons' diets.
C、
They would reveal that there are no significant differences in tooth micro-wear patterns among baboon populations.
D、
They would inadequately reflect the extent to which some baboons consume certain types of insects.
E、
They would indicate that baboons in certain regions eat only soft-bodied insects, whereas baboons in other regions eat hard-bodied insects.
答案:
D
1答疑
[Critical Reasoning]
试题详情
题目：
Advertising by mail has become much less effective, with fewer consumers responding. Because consumers are increasingly overwhelmed by the sheer amount of junk mail they receive, most discard almost all offers without considering them. Thus, an effective way for corporations to improve response rates would be to more carefully target the individuals to whom they mail advertising, thereby cutting down on the amount of junk mail each consumer receives.
Which of the following, if true, would most support this recommendation?
Which of the following, if true, would most support this recommendation?
选项:
A、There are cost-effective means by which corporations that currently advertise by mail could improve response rates.
B、Many successful corporations are already carefully targeting the individuals to whom they mail advertising.
C、Any consumer who, immediately after receiving an advertisement by mail, merely glances at it is very likely to discard it.
D、Improvements in the quality of the advertising materials used in mail that is carefully targeted to individuals can improve the response rate for such mail.
E、Response rates to carefully targeted advertisements by mail are considerably higher, on average, than response rates to most other forms of advertising.
答案:
E
1答疑
[Critical Reasoning]
试题详情
题目：
In virtually any industry, technological improvements increase labor productivity, which is the output of goods and services per person-hour worked. In Parland's industries, labor productivity is significantly higher than it is in Vergia's industries. Clearly, therefore, Parland's industries must, on the whole, be further advanced technologically than Vergia's are.
The argument is most vulnerable to which of the following criticisms?
The argument is most vulnerable to which of the following criticisms?
选项:
A、It offers a conclusion that is no more than a paraphrase of one of the pieces of information provided in its support.
B、It presents as evidence in support of a claim information that is inconsistent with other evidence presented in support of the same claim.
C、It takes one possible cause of a condition to be the actual cause of that condition without considering any other possible causes.
D、It takes a condition to be the effect of something that happened only after the condition already existed.
E、It makes a distinction that presupposes the truth of the conclusion that is to be established.
答案:
C
1答疑
[Critical Reasoning]
试题详情
题目：
Vargonia has just introduced a legal requirement that student-teacher ratios in government-funded schools not exceed a certain limit. All Vargonian children are entitled to education, free of charge, in these schools. When a recession occurs and average incomes fall, the number of children enrolled in government-funded schools tends to increase. Therefore, though most employment opportunities contract in economic recessions, getting a teaching job in Vargonia's government-funded schools will not be made more difficult by a recession.
Which of the following would be most important to determine in order to evaluate the argument?
Which of the following would be most important to determine in order to evaluate the argument?
选项:
A、Whether in Vargonia there are any schools not funded by the government that offer children an education free of charge
B、Whether the number of qualified applicants for teaching positions in government-funded schools increases significantly during economic recessions
C、What the current student-teacher ratio in Vargonia's government-funded schools is
D、What proportion of Vargonia's workers currently hold jobs as teachers in government-funded schools
E、Whether in the past a number of government-funded schools in Vargonia have had student-teacher ratios well in excess of the new limit
答案:
B
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1157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
3304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
3647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
1214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
2786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
1225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
1289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
305245浏览
0评分
312371浏览
