问答

3答疑

[Critical Reasoning]

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题目：

Proponents of the recently introduced tax on sales of new luxury boats had argued that a tax of this sort would be an equitable way to increase government revenue because the admittedly heavy tax burden would fall only on wealthy people and neither they nor anyone else would suffer any economic hardship. In fact, however, 20 percent of the workers employed by manufacturers of luxury boats have lost their jobs as a direct result of this tax.

The information given, if true, most strongly supports which of the following?

选项:

答案:

B
3答疑

[Critical Reasoning]

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文章：

The computer industry’s estimate that it loses millions of dollars when users illegally copy programs without paying for them is greatly exaggerated. Most of the illegal copying is done by people with no serious interest in the programs. Thus, the loss to the industry is quite small, because_____.

题目：

Which of the following best completes the passage below?

选项:

A、many users who illegally copy programs never find any use for themmost people who illegally copy programs would not purchase them even if purchasing them were the only way to obtain them 
B、even if the computer industry received all the revenue it claims to be losing, it would still be experiencing financial difficulties
C、the total market value of all illegal copies is low in comparison to the total revenue of the computer industry 
D、the number of programs that are frequently copied illegally is low in comparison to the number of programs available for sale

答案:

B
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[Sentence Correction]

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题目：

Most insomnia is not an illness or a physical condition so much as a symptom of another problem that may simply be a reaction to certain medications, anxiety about travel, or stress before a job interview.

选项:

A、an illness or a physical condition so much as a symptom of another problem that may simply be a reaction to certain medications
B、an illness or a physical condition so much as symptomatic of another problem that may be a simple one, like a reaction caused by certain medications
C、so much an illness or a physical condition but a symptom of another problem that may be as simple as when certain medications cause a reaction
D、so much an illness or a physical condition, but it is a symptom of another problem, maybe a simple one like certain medications causing a reaction
E、so much an illness or a physical condition but symptomatic of another problem, maybe simply a reaction to certain medications

答案:

A
3答疑

[Critical Reasoning]

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题目：

During the past year, Pro-Tect Insurance Company's total payout on car-theft claims has been larger than the company can afford to sustain.  Pro-Tect cannot reduce the number of car-theft policies it carries, so it cannot protect itself against continued large payouts that way.  Therefore, Pro-Tect has decided to offer a discount to holders of car-theft policies whose cars have antitheft devices.  Many policyholders will respond to the discount by installing such devices, since the amount of the discount will within two years typically more than cover the cost of installation.  Thus, because cars with antitheft devices are rarely stolen, Pro-Tect's plan is likely to reduce its annual payouts.
In the argument above, the two portions in boldface play which of the following roles?

选项:

A、The first and the second are both evidence offered by the argument as support for its main conclusion.
B、The first presents a problem a response to which the argument assesses; the second is the judgment reached by that assessment.
C、The first is the position the argument seeks to establish; the second is a judgment the argument uses to support that position.
D、The first is a development that the argument seeks to explain; the second is a prediction the argument makes in support of the explanation it offers.
E、The first presents a development whose likely outcome is at issue in the argument; the second is a judgment the argument uses in support of its conclusion about that outcome.

答案:

B
3答疑

[Data Sufficiency]

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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:

E
2答疑

[Reading Comprehension]

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文章：

Line In the Sonoran Desert of northwestern Mexico and
southern Arizona, the flowers of several species of
columnar cacti—cardon, saguaro, and organ
pipe—were once exclusively pollinated at night by
(5) nectar-feeding bats, as their close relatives in arid
tropical regions of southern Mexico still are. In these
tropical regions, diurnal (daytime) visitors to columnar
cactus flowers are ineffective pollinators because,
by sunrise, the flowers’ stigmas become unreceptive
(10) or the flowers close. Yet the flowers of the Sonoran
Desert cacti have evolved to remain open after sunrise,
allowing pollination by such diurnal visitors as bees and
birds. Why have these cacti expanded their range of
pollinators by remaining open and receptive in daylight?
(15) This development at the northernmost range of
columnar cacti may be due to a yearly variation in the
abundance—and hence the reliability—of migratory
nectar-feeding bats. Pollinators can be unreliable
for several reasons. They can be dietary generalists
(20) whose fidelity to a particular species depends on
the availability of alternative food sources. Or, they
can be dietary specialists, but their abundance may
vary widely from year to year, resulting in variable
pollination of their preferred food species. Finally, they
(25) may be dietary specialists, but their abundance may
be chronically low relative to the availability of flowers.
Recent data reveals that during spring in the
Sonoran Desert, the nectar-feeding bats are
specialists feeding on cardon, saguaro, and
(30) organpipe flowers. However, whereas cactus-flower
abundance tends to be high during spring, bat
population densities tend to be low except near
maternity roosts. Moreover, in spring, diurnal cactus-
pollinating birds are significantly more abundant in
(35) this region than are the nocturnal bats. Thus, with bats
being unreliable cactus-flower pollinators, and daytime
pollinators more abundant and therefore more reliable,
selection favors the cactus flowers with traits that
increase their range of pollinators. While data suggest
(40) that population densities of nectar-feeding bats are
also low in tropical areas of southern Mexico, where
bats are the exclusive pollinators of many species
of columnar cacti, cactus-flower density and bat
population density appear to be much more evenly
(45) balanced there: compared with the Sonoran Desert’s
cardon and saguaro, columnar cacti in southern Mexico
produce far fewer flowers per night. Accordingly,
despite their low population density, bats are able to
pollinate nearly 100 percent of the available flowers.

题目：

The primary purpose of the passage is to

选项:

A、compare the adaptive responses of several species of columnar cacti in the Sonoran Desert with those in the arid tropical regions of southern Mexico
B、discuss some of the possible causes of the relatively low abundance of migratory nectar-feeding bats in the Sonoran Desert
C、provide a possible explanation for a particular evolutionary change in certain species of columnar cacti in the Sonoran Desert
D、present recent findings that challenge a particular theory as to why several species of columnar cacti in the Sonoran Desert have expanded their range of pollinators
E、compare the effectiveness of nocturnal and diurnal pollination for several different species of columnar cacti in the Sonoran Desert

答案:

C
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[Sentence Correction]

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题目：

An international team of astronomers working at telescopes in the Canary Islands and Spain has detected at least 18 huge gas spheres estimated to have 5 to 15 times the mass of Jupiter, the solar system's largest planet.

选项:

A、 astronomers working at telescopes in the Canary Islands and Spain has detected at least 18 huge gas spheres estimated to have 5 to 15 times the mass of Jupiter
B、 astronomers working at telescopes in the Canary Islands and Spain has detected at least 18 huge gas spheres that are at an estimated 5 to 15 times Jupiter's mass
C、 astronomers is working at telescopes in the Canary Islands and Spain, having detected at least 18 huge gas spheres that are estimated at 5 to 15 times the mass of Jupiter
D、 astronomers, working at telescopes in the Canary Islands and Spain, and has detected at least 18 huge gas spheres estimated at 5 to 15 times the mass of Jupiter
E、 astronomers, working at telescopes in the Canary Islands and Spain, has detected at least 18 huge gas spheres they have estimated as being 5 to 15 times Jupiter's mass

答案:

A
2答疑

[Critical Reasoning]

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题目：

Farmer: Worldwide, just three grain crops—rice, wheat, and corn—account for most human caloric intake. To maintain this level of caloric intake and also keep pace with global population growth, yields per acre from each of these crops will have to increase at least 1.5 percent every year, given that the supply of cultivated land is diminishing. Therefore, the government should increase funding for research into new ways to improve yields.

Which of the following is an assumption on which the farmer's argument depends?

选项:

A、It is solely the government's responsibility to ensure that the amount of rice, wheat, and corn produced worldwide keeps pace with global population growth.
B、Increasing government funding for research into new ways to improve the yields per acre of rice, wheat, and corn crops would help to increase total worldwide annual production of food from these crops.
C、Increasing the yields per acre of rice, wheat, and corn is more important than increasing the yields per acre of other crops.
D、Current levels of funding for research into ways of improving grain crop yields per acre have enabled grain crop yields per acre to increase by more than 1.5 percent per year worldwide.
E、In coming decades, rice, wheat, and corn will become a minor part of human caloric intake, unless there is government-funded research to increase their yields per acre.

答案:

B
2答疑

[Critical Reasoning]

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题目：

Because it was long thought that few people would watch lengthy televised political messages, most televised political advertisements, like commercial advertisements, took the form of short messages.  Last year, however, one candidate produced a half-hour-long advertisement.  During the half hour the advertisement was aired, a substantial portion of the viewing public tuned into the advertisement.  Clearly, then, many more people are interested in watching lengthy televised political messages than was previously thought.
 
Which of the following is an assumption on which the argument depends?

选项:

A、The candidate's ratings improved significantly as a result of the half-hour-long political advertisement.
B、Political advertisements have become increasingly influential in determining voters' decisions at the polls.
C、Many people would appreciate the opportunity to become better acquainted with political candidates' views on current political issues.
D、Most people who are interested in political issues watch television regularly.
E、Most of the viewers who tuned in to the candidate's half-hour-long advertisement last year did not change channels after the first few minutes.

答案:

E
2答疑

[Data Sufficiency]

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题目：

What is the sum of a certain pair of consecutive odd integers?
(1)     At least one of the integers is negative.
(2)     At least one of the integers is positive.

选项:

答案:

C
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1129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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[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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3529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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[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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2704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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[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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[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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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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[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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[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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