问答

1答疑

[Data Sufficiency]

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试题详情

题目：

If k is an integer such that 56 < k < 66, what is the value of k ?
  1. If k were divided by 2, the remainder would be 1.
  2. If k + 1 were divided by 3, the remainder would be 0.

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
1答疑

[Data Sufficiency]

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题目：

A small school has three foreign language classes, one in French, one in Spanish, and one in German. How many of the 34 students enrolled in the Spanish class are also enrolled in the French class?
  1. There are 27 students enrolled in the French class, and 49 students enrolled in either the French class, the Spanish class, or both of these classes.
  2. One-half of the students enrolled in the Spanish class are enrolled in more than one foreign language class.

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:

A
1答疑

[Critical Reasoning]

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题目：

Researchers conditioned a group of flies to associate a particular odor with a weak electric shock. Twenty-four and forty-eight hours later the researchers conducted tests on the flies, both individually and in groups, to determine whether the flies retained the conditioning. When tested individually, the flies were significantly less likely to avoid areas marked with the odor. The researchers hypothesized that in the presence of the odor, a fly that retains the conditioned association gives off an alarm signal that arouses the attention of any surrounding flies, retriggering the association in them and thereby causing them to avoid the odor.

The researchers’ hypothesis requires which of the following assumptions?

选项:

A、The flies do not give off odors as alarm signals.
B、Flies that did not avoid the odor when tested individually were not merely following other flies’ movements when tested in a group.
C、Flies that did not avoid the odor when tested individually were less likely than the other flies to avoid the odor when tested in a group.
D、Prior to their conditioning, the flies would likely have found the odor used in the experiment to be pleasant.
E、An electric shock was used during the flies’ conditioning and during the later tests.

答案:

B
1答疑

[Data Sufficiency]

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题目：

The diagram consists of a rhombus with sides AD, DB, BC, and CA. Two right angled triangles that form this rhombus are DAB and ACB.

In the figure above, is the area of triangular region ABC equal to the area of triangular region DBA ?

  1. (AC)2 = 2(AD)2
  2. Δ ABC is isosceles.

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]

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试题详情

题目：

For what percent of those tested for a certain infection was the test accurate; that is, positive for those who had the infection and negative for those who did not have the infection?
(1) Of those who tested positive for the infection, 1/8 did not have the infection.
(2) Of those tested for the infection, 90 percent tested negative.

选项:

答案:

E
1答疑

[Sentence Correction]

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题目：

Today's technology allows manufacturers to make small cars more fuel-efficient now than at any time in their production history.

选项:

A、small cars more fuel-efficient now than at any time in their
B、small cars that are more fuel-efficient than they were at any time in their
C、small cars that are more fuel-efficient than those at any other time in
D、more fuel-efficient small cars than those at any other time in their
E、more fuel-efficient small cars now than at any time in

答案:

C
1答疑

[Data Sufficiency]

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试题详情

题目：

选项:

A、with the simple thesis of consumers having
B、which had the simple thesis of consumers having
C、where the thesis was simple: consumers having
D、with a thesis that is a simple one: consumers have
E、whose thesis was simple: consumers have

答案:

C
1答疑

[Sentence Correction]

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试题详情

题目：

Unlike battery-powered electric cars, automakers say that cars with fuel cells, which supply them with electricity, can provide driving range and performance similar to the internal combustion engine.

选项:

A、Unlike battery-powered electric cars, automakers say that cars with fuel cells, which supply them with electricity, can provide driving range and performance similar to
B、Unlike battery-powered electric cars, automakers say that cars with electricity supplied by fuel cells can exhibit driving range and performance similar to those provided by
C、Unlike battery-powered electric cars, fuel cells that supply cars with electricity can provide driving range and performance that automakers say is similar to
D、Automakers say that unlike battery-powered electric cars, fuel cells that supply cars with electricity can provide driving range and performance similar to
E、Automakers say that unlike battery-powered electric cars, cars with electricity supplied by fuel cells can exhibit driving range and performance similar to those provided by

答案:

E
1答疑

[Data Sufficiency]

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试题详情

题目：

If the average (arithmetic mean) of n consecutive odd integers is 10, what is the least of the integers?
  1. The range of the n integers is 14.
  2. The greatest of the n integers is 17.

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:

D
1答疑

[Problem Solving]

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试题详情

题目：

If 9x = 27y, which of the following expresses x in terms of y?

选项:

A、3y
B、3y-1
C、32y-1
D、32y-3
E、33y-2

答案:

E
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337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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1291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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1468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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565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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1320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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941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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631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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637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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151064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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158172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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