问答

1答疑

[Critical Reasoning]

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题目：

Sammy: For my arthritis, I am going to try my aunt's diet: large amounts of wheat germ and garlic. She was able to move more easily right after she started that diet.

Pat: When my brother began that diet, his arthritis got worse. But he has been doing much better since he stopped eating vegetables in the nightshade family, such as tomatoes and peppers.

Which of the following, if true, would provide a basis for explaining the fact that Sammy's aunt and Pat's brother had contrasting experiences with the same diet?

选项:

A、A change in diet, regardless of the nature of the change, frequently brings temporary relief from arthritis symptoms.
B、The compounds in garlic that can lessen the symptoms of arthritis are also present in tomatoes and peppers.
C、Arthritis is a chronic condition whose symptoms improve and worsen from time to time without regard to diet.
D、In general, men are more likely to have their arthritis symptoms alleviated by avoiding vegetables in the nightshade family than are women.
E、People who are closely related are more likely to experience the same result from adopting a particular diet than are people who are unrelated.

答案:

C
1答疑

[Problem Solving]

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题目：

A certain online form requires a 2-digit code for the day of the month to be entered into one of its fields, such as 04 for the 4th day of the month. The code is valid if it is 01, 02, 03, ..., 31 and not valid otherwise. The transpose of a code xy is yx. For example, 40 is the transpose of 04. If N is the number of valid codes having a transpose that is not valid, what is the value of N ?

选项:

A、12
B、13
C、18
D、19
E、20

答案:

D
1答疑

[Data Sufficiency]

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题目：

a1 , a2 , a3 , . . . , a15
In the sequence shown, an = an – 1 + k, where 2 ≤ n ≤ 15 and k is a nonzero constant. How many of the terms in the sequence are greater than 10 ?
(1)a1 = 24
(2)a8 = 10

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：

Line Determining whether a given population of animals
constitutes a distinct species can be difficult
because no single accepted definition of the term
exists. One approach, called the biological species
(5) concept, bases the definition on reproductive
compatibility. According to this view, a species
is a group of animals that can mate with one
another to produce fertile offspring but cannot
mate successfully with members of a different
(10) group. Yet this idea can be too restrictive. First,
mating between groups labeled as different species
(hybridization), as often occurs in the canine family,
is quite common in nature. Second, sometimes
the differences between two populations might not
(15) prevent them from interbreeding, even though they
are dissimilar in traits unrelated to reproduction;
some biologists question whether such disparate
groups should be considered a single species. A
third problem with the biological species concept is
(20) that investigators cannot always determine whether
two groups that live in different places are capable
of interbreeding.
When the biological species concept is difficult
to apply, some investigators use phenotype, an
(25) organism’s observable characteristics, instead.
Two groups that have evolved separately are likely
to display measurable differences in many of their
traits, such as skull size or width of teeth. If the
distribution of measurements from one group does
(30) not overlap with those of another, the two groups
might reasonably be considered distinct species.

题目：

Which of the following best describes the function of lines 10–13

选项:

A、It elaborates the definition of the biological species concept given in a previous sentence.
B、It develops a point about the biological species concept made in the previous sentence.
C、It states the author’s central point about the biological species concept.
D、It identifies a central assumption underlying the biological species concept.
E、It demonstrates why the biological species concept is invalid.

答案:

B
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[Problem Solving]

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题目：

The figure shows a floor plan of an executive's beach house in a quadrilateral structure. The north and south walls of the living room are parallel.

In the floor plan of an executive's beach house above, the north and south walls of the living room are parallel. What is the floor area, in square feet, of the bedroom?

选项:

A、
B、450
C、
D、225
E、It cannot be determined from the information given.

答案:

C
1答疑

[Sentence Correction]

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题目：

Analyzing campaign expenditures, the media has had as a focus the high costs and low ethics of campaign finance, but they have generally overlooked the cost of actually administering elections, which includes facilities, transport, printing, staffing, and technology.

选项:

A、Analyzing campaign expenditures, the media has had as a focus
B、Analyses of campaign expenditures by the media has been focus on
C、In analyzing campaign expenditures, the media have focused on
D、Media analyses of campaign expenditures have had as a focus
E、In their analysis of campaign expenditures, the media has been focusing on

答案:

C
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[Sentence Correction]

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题目：

Seldom more than 40 feet wide and 12 feet deep, but it ran 363 miles across the rugged wilderness of upstate New York, the Erie Canal connected the Hudson River at Albany to the Great Lakes at Buffalo, providing the port of New York City with a direct water link to the heartland of the North American continent.

选项:

A、Seldom more than 40 feet wide and 12 feet deep, but it ran 363 miles across the rugged wilderness of upstate New York, the Erie Canal connected
B、Seldom more than 40 feet wide or 12 feet deep but running 363 miles across the rugged wilderness of upstate New York, the Erie Canal connected
C、It was seldom more than 40 feet wide and 12 feet deep, and ran 363 miles across the rugged wilderness of upstate New York, but the Erie Canal, connecting
D、The Erie Canal was seldom more than 40 feet wide or 12 feet deep and it ran 363 miles across the rugged wilderness of upstate New York, which connected
E、The Erie Canal, seldom more than 40 feet wide and 12 feet deep, but running 363 miles across the rugged wilderness of upstate New York, connecting

答案:

B
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[Reading Comprehension]

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文章：

Line Arboria is floundering in the global marketplace,
incurring devastating losses in market position and
profits. The problem is not Arboria's products, but
Arboria's trade policy. Arboria faces the prospect
(5) of continuing economic loss until Arborian business
and political leaders recognize the fundamental
differences between Arborian and foreign economic
systems. Today the key trade issue is not free trade
versus protectionism but diminishing trade versus
(10) expanding trade.
Arboria is operating with an obsolete trade policy,
an artifact of the mid-1940s when Arboria and
Whorfland dominated the global economy, tariffs
were the principal obstacle to trade, and Arborian
(15) supremacy was uncontested in virtually all industries.
In the intervening decades, economic circumstances
have shifted radically. Arborian trade policy has not.
Today, Arboria's trade policy seems paralyzed
by the relentless conflict between proponents of
(20) “free” and “fair” trade. The free traders argue that
Arborian markets should be open, and the movement
of goods and services across national borders
unrestrained. The fair traders assert that access to
Arborian markets should be restricted until Arborian
(25) businesses are granted equal access to foreign
markets. They contend that free trade is impossible
while other nations erect barriers to Arborian exports.
Both are correct: fair trade requires equal access
and equal access leads to free trade. But both sides
(30) base their positions on the same two outdated
premises:
1. Global commerce is conducted under the terms of
the General Agreement on Tariffs and Trade (GATT)
and dominated by Arboria and similar economic
(35) systems abroad.
2. Multilateral negotiations are the most effective way
to resolve pressing trade issues.
Both assumptions are wrong. The 40-year-old GATT
now covers less than 7 percent of global commerce.
(40) World trade is no longer dominated by the free-
trade economies; nearly 75 percent is conducted
by economic systems operating with principles at
odds with those of Arboria. Forging a multilateral
trade policy consensus among so many diverse
(45) economic systems has become virtually impossible.
And while multilateral talks drag on, Arboria misses
opportunities for trade expansion.

题目：

The author implies that the main obstacle to a truly effective Arborian trade policy is the

选项:

A、weak position that Arboria currently holds in the global marketplace
B、inability of Arborian leaders to recognize that foreign economic systems are based on principles fundamentally different from their own
C、dominance of the supporters of free trade in the conflict between free-trade and fair-trade advocates
D、apparent inability of Arborian industries to produce goods that are competitive in the world market
E、protectionism that characterizes the foreign trade policies of so many of Arboria's trade partners

答案:

B
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[Problem Solving]

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题目：

For any positive integer n, the length of n is defined as the number of prime factors whose product is n. For example, the length of 75 is 3, since 75 = 3 × 5 × 5. How many two-digit positive integers have length 6 ?

选项:

A、None
B、One
C、Two
D、Three
E、Four

答案:

C
1答疑

[Critical Reasoning]

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题目：

Advertisement: Our competitors’ computer salespeople are paid according to the value of the products they sell, so they have a financial incentive to convince you to buy the most expensive units—whether you need them or not. But here at Comput-o-Mart, our salespeople are paid a salary that is not dependent on the value of their sales, so they won’t try to tell you what to buy. That means when you buy a computer at Comput-o-Mart, you can be sure you’re not paying for computing capabilities you don’t need.

Which of the following would, if true, most weaken the advertisement’s reasoning?

选项:

A、Some less-expensive computers actually have greater computing power than more expensive ones.
B、Salespeople who have a financial incentive to make sales generally provide more attentive service than do other salespeople.
C、Extended warranties purchased for less-expensive computers can cost nearly as much as the purchase price of the computer.
D、Comput-o-Mart is open only limited hours, which makes it more difficult for many shoppers to buy computers there than at other retail stores.
E、Comput-o-Mart does not sell any computers that support only basic computing.

答案:

E
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1156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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3293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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3642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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2778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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1287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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[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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311896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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