问答

1答疑

[Sentence Correction]

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题目：

Clouds are formed from the evaporation of the oceans’ water that is warmed by the Sun and rises high into the atmosphere, condensing in tiny droplets on minute particles of dust.

选项:

A、Clouds are formed from the evaporation of the oceans' water that is warmed by the Sun and rises high into the atmosphere, condensing in tiny droplets on minute particles of dust.
B、Clouds form by the Sun's warmth evaporating the water in the oceans, which rises high into the atmosphere, condensing in tiny droplets on minute particles of dust.
C、Warmed by the Sun, ocean water evaporates, rises high into the atmosphere, and condenses in tiny droplets on minute particles of dust to form clouds.
D、The water in the oceans evaporates, warmed by the Sun, rises high into the atmosphere, and condenses in tiny droplets on minute particles of dust, which forms clouds.
E、Ocean water, warmed by the Sun, evaporates and rises high into the atmosphere, which then condenses in tiny droplets on minute particles of dust to form as clouds.

答案:

C
1答疑

[Critical Reasoning]

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题目：

Kayla: Many people are reluctant to shop in our neighborhood because street parking is scarce. The city plans to address this by adding parking meters with time limits that ensure that parking spaces are generally available. But this plan will surely backfire—shoppers dislike paying at parking meters, so most will probably drive to other neighborhoods to shop at malls with free parking.

Which of the following, if true, would be the most logically effective rebuttal a proponent of the city’s plan could make to Kayla’s objection?

选项:

A、Most shoppers dislike hunting for scarce street parking spaces much more than they dislike paying for metered parking spaces.
B、The city could post signs with street parking time limits to ensure that parking spaces become available without forcing shoppers to pay at meters.
C、Currently, most shoppers in the neighborhood drive only occasionally to shop at malls in other neighborhoods.
D、The neighborhood already contains a parking lot where shoppers must pay to park.
E、The nearby malls with free parking have no parking time limits to help ensure that parking spaces in their lots become available.

答案:

A
1答疑

[Reading Comprehension]

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题目：

The passage indicates that Robertson's research in Kenya caused her to change her mind regarding which of the following?

选项:

A、Whether age was the prevailing principle of social organization in Kenya before colonialism
B、Whether gender was the primary determinant of social authority in Africa generally before colonialism
C、Whether it was only after colonialism that gender became a significant determinant of authority in Kenyan society
D、Whether age was a crucial factor determining authority in Africa after colonialism
E、Whether British colonialism imposed European-style male-dominant notions upon local situations in Ghana

答案:

C
1答疑

[Critical Reasoning]

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题目：

Art restorers who have been studying the factors that cause Renaissance oil paintings to deteriorate physically when subject to climatic changes have found that the oil paint used in these paintings actually adjusts to these changes well. The restorers therefore hypothesize that it is a layer of material called gesso, which is under the paint, that causes the deterioration.

Which of the following, if true, most strongly supports the restorers' hypothesis?

选项:

A、
A. Renaissance oil paintings with a thin layer of gesso are less likely to show deterioration in response to climatic changes than those with a thicker layer.
B、
B. Renaissance oil paintings are often painted on wooden panels, which swell when humidity increases and contract when it declines.
C、
C. Oil paint expands and contracts readily in response to changes in temperature, but it absorbs little water and so is little affected by changes in humidity.
D、
D. An especially hard and nonabsorbent type of gesso was the raw material for moldings on the frames of Renaissance oil paintings.
E、
E. Gesso layers applied by Renaissance painters typically consisted of a coarse base layer onto which several increasingly fine-grained layers were applied.

答案:

A
1答疑

[Problem Solving]

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题目：

Machines X and Y run at different constant rates, and machine X can complete a certain job in 9 hours. Machine X worked on the job alone for the first 3 hours and the two machines, working together, then completed the job in 4 more hours. How many hours would it have taken machine Y, working alone, to complete the entire job?

选项:

A、18
B、
C、
D、
E、

答案:

A
1答疑

[Data Sufficiency]

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题目：

Is –3 ≤ x ≤ 3 ?
  1. x 2 + y 2 = 9
  2. x 2 + y ≤ 9

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

[Critical Reasoning]

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题目：

Which of the following most logically completes the argument?
A certain cultivated herb is one of a group of closely related plants that thrive in soil with high concentrations of metals that are toxic to most other plants. Agronomists studying the herb have discovered that it produces large amounts of histidine, an amino acid that, in test-tube solutions, renders these metals chemically inert. Possibly, therefore, the herb's high histidine production is what allows it to grow in metal-rich soils, a hypothesis that would gain support if ______.

选项:

A、histidine is found in all parts of the plant-roots, stem, leaves, and flowers
B、the herb's high level of histidine production is found to be associated with an unusually low level of production of other amino acids
C、others of the closely related group of plants are also found to produce histidine in large quantities
D、cultivation of the herb in soil with high concentrations of the metals will, over an extended period, make the soil suitable for plants to which the metals are toxic
E、the concentration of histidine in the growing herb declines as the plant approaches maturity

答案:

C
1答疑

[Sentence Correction]

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题目：

Having finally reached a tentative labor agreement with its company's pilots, it must now be determined by the airline's board of directors how the airline can both increase profits and compete more effectively for customers than they did in the past.

选项:

A、 it must now be determined by the airline's board of directors how the airline can both increase profits and compete more effectively for customers than they did in the past
B、 it must now be determined by the airline's board of directors how the airline can both increase profits and must compete more effectively than in the past for customers
C、 the airline's board of directors must now determine both how to make the airline increase profits and compete more effectively for customers than they did in the past
D、 the airline's board of directors must now determine how the airline can both increase profits and compete more effectively for customers than it did in the past
E、 the airline's board of directors must now determine how the airline can both increase profits and also how to make it compete more effectively than in the past for customers

答案:

D
1答疑

[Graphics Interpretation]

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题目：

During the first week of April, the ChefZ cooking pan was out of stock at Online Retailer X. Day 1 shoppers are those shoppers who came to Online Retailer X's website seeking a ChefZ cooking pan. For each of the first 3 days of that week, the graph shows the subsequent behavior of all the Day 1 shoppers who visited Online Retailer X's website seeking ChefZ. Shoppers who came to the website and purchased a different item in lieu of ChefZ paid an average of 25% more for the item.

From each drop-down menu, select the option that creates the most accurate statement based on the information provided.

选项:

% of Day 1 shoppers visited the site on Day 3.

Shoppers at Online Retailer X who purchased substitute items on Day 1 and Day 2 paid a total amount that was approximately% of the total all Day 1 shoppers would have paid had each of them been able to purchase ChefZ on Day 1.

答案:

B C
1答疑

[Data Sufficiency]

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题目：

How many integers n are there such that r < n < s ?
  1. s − r = 5
  2. r and s are not integers.

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 (1) and (2) 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
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1141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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3251浏览

[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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3602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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1195浏览

[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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2746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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1887浏览

[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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1212浏览

[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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1272浏览

[Undefined]

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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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301962浏览

[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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309089浏览

[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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