问答

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:

A、
They can identify when an earthquake is likely to occur but not how large it will be.
B、
They can identify the regions where earthquakes are likely to occur but not when they will occur.
C、
They are unable to determine either the time or the place that earthquakes are likely to occur.
D、
They are likely to be more accurate at short-term earthquake prediction than at long-term earthquake prediction.
E、
They can determine the regions where earthquakes have occurred in the past but not the regions where they are likely to occur in the future.

答案:

C
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[Problem Solving]

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题目：

When a certain tree was first planted, it was 4 feet tall, and the height of the tree increased by a constant amount each year for the next 6 years. At the end of the 6th year, the tree was taller than it was at the end of the 4th year. By how many feet did the height of the tree increase each year?

选项:

A、
B、
C、
D、
E、

答案:

D
1答疑

[Data Sufficiency]

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题目：

Is xy ＞ x/y?
(1) xy ＞ 0
(2) y ＜ 0
獲漠

选项:

答案:

E
1答疑

[Reading Comprehension]

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文章：

Comparable worth, as a standard applied to eliminate inequities in pay, insists that the values of certain tasks performed in dissimilar jobs can be compared.  In the last decade, this approach has become a critical social policy issue, as large numbers of private-sector firms and industries as well as federal, state, and local governmental entities have adopted comparable worth policies or begun to consider doing so.
 
This widespread institutional awareness of comparable worth indicates increased public awareness that pay inequities--that is, situations in which pay is not "fair" because it does not reflect the true value of a job--exist in the labor market.  However, the question still remains:  have the gains already made in pay equity under comparable worth principles been of a precedent-setting nature or are they mostly transitory, a function of concessions made by employers to mislead female employees into believing that they have made long-term pay equity gains?
 
Comparable worth pay adjustments are indeed precedent-setting.  Because of the principles driving them, other mandates that can be applied to reduce or eliminate unjustified pay gaps between male and female workers have not remedied perceived pay inequities satisfactorily for the litigants in cases in which men and women hold different jobs.  But whenever comparable worth principles are applied to pay schedules, perceived unjustified pay differences are eliminated.  In this sense, then, comparable worth is more comprehensive than other mandates, such as the Equal Pay Act of 1963 and Title VII of the Civil Rights Act of 1964.  Neither compares tasks in dissimilar jobs (that is, jobs across occupational categories) in an effort to determine whether or not what is necessary to perform these tasks--know-how, problem-solving, and accountability--can be quantified in terms of its dollar value to the employer.  Comparable worth, on the other hand, takes as its premise that certain tasks in dissimilar jobs may require a similar amount of training, effort, and skill; may carry similar responsibility; may be carried on in an environment having a similar impact upon the worker; and may have a similar dollar value to the employer.

题目：

According to the passage, which of the following is true of comparable worth as a policy?

选项:

A、Comparable worth policy decisions in pay-inequity cases have often failed to satisfy the complainants.
B、Comparable worth policies have been applied to both public-sector and private-sector employee pay schedules.
C、Comparable worth as a policy has come to be widely criticized in the past decade.
D、Many employers have considered comparable worth as a policy but very few have actually adopted it.
E、Early implementations of comparable worth policies resulted in only transitory gains in pay equity.

答案:

B
1答疑

[Critical Reasoning]

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题目：

Most banks that issue credit cards charge interest rates on credit card debt that are ten percentage points higher than the rates those banks charge for ordinary consumer loans. These banks’ representatives claim the difference is fully justified, since it simply covers the difference between the costs to these banks associated with credit card debt and those associated with consumer loans.

Which of the following, if true, most seriously calls into question the reasoning offered by the banks’ representatives?

选项:

A、Some lenders that are not banks offer consumer loans at interest rates that are even higher than most banks charge on credit card debt.
B、Most car rental companies require that their customers provide signed credit card charge slips or security deposits.
C、Two to three percent of the selling price of every item bought with a given credit card goes to the bank that issued that credit card.
D、Most people need not use credit cards to buy everyday necessities, but could buy those necessities with cash or pay by check.
E、People who pay their credit card bills in full each month usually pay no interest on the amounts they charge.

答案:

C
1答疑

[Critical Reasoning]

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文章：

Because of steep increases in the average price per box of cereal over the last 10 years, overall sales of cereal have recently begun to drop. In an attempt to improve sales, one major cereal manufacturer reduced the wholesale prices of its cereals by 20 percent. Since most other cereal manufacturers have announced that they will follow suit, it is likely that the level of overall sales of cereal will rise significantly.

题目：

Which of the following would it be most useful to establish in evaluating the argument?

选项:

A、Whether the high marketing expenses of the highly competitive cereal market led to the increase in cereal prices Whether cereal manufacturers use marketing techniques that encourage brand loyalty among consumers
B、Whether the variety of cereals available on the market has significantly increased over the last 10 years 
C、Whether the prices that supermarkets charge for these cereals will reflect the lower prices the supermarkets will be paying the manufacturers
D、Whether the sales of certain types of cereal have declined disproportionately over the last 10 years

答案:

D
1答疑

[Data Sufficiency]

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题目：

A certain one-day seminar consisted of a morning session and an afternoon session.;;If each of the 128 people attending the seminar attended at least one of the two sessions, how many of the people attended the morning session only?

(1) $$frac{3}{4}$$ of the people attended both sessions.

(2) $$frac{7}{8}$$ of the people attended the afternoon session.

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 statement 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
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[Problem Solving]

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题目：

If n is a positive integer and n2 is divisible by 72, then the largest positive integer that must divide n is

选项:

A、 6
B、12
C、24
D、36
E、48

答案:

B
1答疑

[Reading Comprehension]

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文章：

题目：

Which of the following best describes the function of the sentence in lines 35–38?

选项:

A、To give an example of a particular kind of study
B、To cast doubt on an assertion made in the previous sentence
C、To raise an objection to a view presented in the first paragraph
D、To provide support for a view presented in the first paragraph
E、To introduce an idea that will be countered in the following paragraph

答案:

C
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[Problem Solving]

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题目：

A rectangular garden is to be twice as long as it is wide. If 360 yards of fencing, including the gate, will completely enclose the garden, what will be the length of the garden, in yards?

选项:

A、120
B、140
C、160
D、180
E、200

答案:

A
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1935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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5034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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5711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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1917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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4138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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2907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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1920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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2005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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427775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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434913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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