问答

1答疑

[Critical Reasoning]

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题目：

Plan: Concerned about the welfare of its senior citizens, the government of Runagia decided two years ago to increase by 20 percent the government-provided pension paid to all Runagians age sixty-five and older. Result: Many Runagian senior citizens are no better off financially now than they were before the increase. Further information: The annual rate of inflation since the pension increase has been below 5 percent, and the increased pension has been duly received by all eligible Runagians.

In light of the further information, which of the following, if true, does most to explain the result that followed implementation of the plan?

选项:

A、The majority of senior citizens whose financial position has not improved rely entirely on the government pension for their income.
B、The Runagian banking system is so inefficient that cashing a pension check can take as much as three weeks.
C、The prices of goods and services that meet the special needs of many senior citizens have increased at a rate much higher than the rate of inflation.
D、The pension increase occurred at a time when the number of Runagians age sixty-five and older who were living below the poverty level was at an all-time high.
E、The most recent pension increase was only the second such increase in the last ten years.

答案:

C
1答疑

[Reading Comprehension]

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文章：

Line         Biologists have advanced two theories to explain
  why schooling of fish occurs in so many fish species.
  Because schooling is particularly widespread among
  species of small fish, both theories assume that
(5) schooling offers the advantage of some protection
  from predators.
       Proponents of theory A dispute the assumption
  that a school of thousands of fish is highly visible.
  Experiments have shown that any fish can be seen,
(10) even in very clear water, only within a sphere of 200
  meters in diameter. When fish are in a compact group,
  the spheres of visibility overlap. Thus the chance of
  a predator finding the school is only slightly greater
  than the chance of the predator finding a single fish
(15) swimming alone. Schooling is advantageous to the
  individual fish because a predator’s chance of finding
  any particular fish swimming in the school is much
  smaller than its chance of finding at least one of
  the same group of fish if the fish were dispersed
(20) throughout an area.
       However, critics of theory A point out that some
  fish form schools even in areas where predators
  are abundant and thus little possibility of escaping
  detection exists. They argue that the school continues
(25) to be of value to its members even after detection.
  They advocate theory B, the “confusion effect,” which
  can be explained in two different ways.
       Sometimes, proponents argue, predators simply
  cannot decide which fish to attack. This indecision
(30) supposedly results from a predator’s preference
  for striking prey that is distinct from the rest of the
  school in appearance. In many schools the fish are
  almost identical in appearance, making it difficult for a
  predator to select one. The second explanation for
(35) the “confusion effect” has to do with the sensory
  confusion caused by a large number of prey moving
  around the predator. Even if the predator
  makes the decision to attack a particular fish,
  the movement of other prey in the school can
(40) be distracting. The predator’s difficulty can
  be compared to that of a tennis player trying
  to hit a tennis ball when two are approaching
  simultaneously.


题目：

According to the passage, both theory A and theory B have been developed to explain how

选项:

A、fish hide from predators by forming schools
B、forming schools functions to protect fish from predators
C、schooling among fish differs from other protective behaviors
D、small fish are able to make rapid decisions
E、small fish are able to survive in an environment densely populated by large predators

答案:

B
1答疑

[Data Sufficiency]

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题目：

Are at least 10 percent of the people in Country X who are 65 years old or older employed?
(1) In Country X, 11.3 percent of the population is 65 years old or older.
(2) In Country X, of the population 65 years old or older, 20 percent of the men and 10 percent of the women are employed.

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:

B
1答疑

[Reading Comprehension]

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文章：

The fact that superior service ca n generate a competitive advantage for a company does not mean that every attempt at improving service will create such an advantage. Investments in service, like those in production and distribution, must be balanced against other types of investments on the basis of direct, tangible benefits such as cost reduction and increased revenues. If a company is already effectively on a par with its competitors because it provides service that avoids a damaging reputation and keeps customers from leaving at an unacceptable rate, then investment in higher service levels may be wasted, since service is a deciding factor for customers only in extreme situations.

This truth was not apparent to managers of one regional bank, which failed to improve its competitive position despite its investment in reducing the time a customer had to. wait for a teller, The bank managers did not recognize the level of customer inertia in the consumer banking industry that arises from the inconvenience of switching banks. Nor did they analyze their service improvement to determine whether it would attract new customers by producing a new standard of service that would excite customers or by proving difficult for competitors to copy. The only merit of the improvement was that it could easily be described to customers.

题目：

According to the passage, investments in service are comparable to investments in production and distribution in terms of the

选项:

A、tangibility of the benefits that they tend to conferincreased revenues that they ultimately produce
B、basis on which they need to be weighed
C、insufficient analysis that managers devote to them
D、degree of competitive advantage that they are likely to provide

答案:

C
1答疑

[Sentence Correction]

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题目：

In theory, international civil servants at the United Nations are prohibited from continuing to draw salaries from their own governments；in practice, however some governments merely substitute living allowances for their employees' paychecks, assigned by them to the United Nations.

选项:

A、for their employees' paychecks, assigned by themfor the paychecks of their employees who have been assigned
B、for the paychecks of their employees, having been assigned
C、in place of their employees' paychecks, for those of them assigned
D、in place of the paychecks of their employees to have been assigned by them

答案:

B
1答疑

[Data Sufficiency]

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题目：

An insurance company has a contract with a medical laboratory to pay a discounted price for a certain medical test performed on patients referred to the laboratory by the insurance company. If the laboratory's original bill for this medical test on a patient referred by the insurance company is $230, what is the percent discount specified by the contract between the laboratory and the insurance company?
(1) The insurance company is required to pay only 20 percent of the original bill for the test.
(2) The insurance company is required to pay $46 for the test.

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:

D
1答疑

[Sentence Correction]

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题目：

Galileo was convinced that natural phenomena, as manifestations of the laws of physics, would appear the same to someone on the deck of a ship moving smoothly and uniformly through the water as a person standing on land.

选项:

A、water as a
B、water as to a
C、water; just as it would to a
D、water, as it would to the
E、water; just as to the

答案:

B
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[Sentence Correction]

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题目：

The North American moose's long legs enable it to move quickly through the woods, stepping easily over downed trees, but predators pursuing it must leap or go around them.

选项:

答案:

E
1答疑

[Critical Reasoning]

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题目：

Which of the following most logically completes the passage?

Leaf beetles damage willow trees by stripping away their leaves, but a combination of parasites and predators generally keeps populations of these beetles in check. Researchers have found that severe air pollution results in reduced predator populations. The parasites, by contrast, are not adversely affected by pollution; nevertheless, the researchers' discovery probably does explain why leaf beetles cause particularly severe damage to willows in areas with severe air pollution, since __________.

选项:

答案:

D
1答疑

[Reading Comprehension]

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文章：

Line In 1971 researchers hoping to predict earthquakes in
the short term by identifying precursory phenomena
(those that occur a few days before large quakes
but not otherwise) turned their attention to changes
(5) in seismic waves that had been detected prior to
earthquakes. An explanation for such changes was
offered by “dilatancy theory,” based on a well-known
phenomenon observed in rocks in the laboratory:
as stress builds, microfractures in rock close,
(10) decreasing the rock’s volume. But as stress
continues to increase, the rock begins to crack and
expand in volume, allowing groundwater to seep in,
weakening the rock. According to this theory, such
effects could lead to several precursory phenomena in
(15) the field, including a change in the velocity of seismic
waves, and an increase in small, nearby tremors.
Researchers initially reported success in identifying
these possible precursors, but subsequent analyses
of their data proved disheartening. Seismic waves
(20) with unusual velocities were recorded before some
earthquakes, but while the historical record confirms
that most large earthquakes are preceded by minor
tremors, these foreshocks indicate nothing about
the magnitude of an impending quake and are
(25) indistinguishable from other minor tremors that occur
without large earthquakes.
In the 1980s, some researchers turned their
efforts from short-term to long-term prediction.
Noting that earthquakes tend to occur repeatedly in
(30) certain regions, Lindh and Baker attempted to identify
patterns of recurrence, or earthquake cycles, on which
to base predictions. In a study of earthquake-prone
sites along the San Andreas Fault, they determined
that quakes occurred at intervals of approximately 22
(35) years near one site and concluded that there was a
95 percent probability of an earthquake in that area
by 1992. The earthquake did not occur within the time
frame predicted, however.
Evidence against the kind of regular
(40) earthquake cycles that Lindh and Baker tried
to establish has come from a relatively new
field, paleoseismology. Paleoseismologists
have unearthed and dated geological features
such as fault scarps that were caused by
(45) earthquakes thousands of years ago. They have
determined that the average interval between ten
earthquakes that took place at one site along the
San Andreas Fault in the past two millennia was
132 years, but individual intervals ranged greatly,
(50) from 44 to 332 years.

题目：

The author implies which of the following about the ability of the researchers mentioned in line 18 to predict earthquakes?

选项:

答案:

C
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1293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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3664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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4030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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1339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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3005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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1407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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332713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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339840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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