问答

1答疑

[Reading Comprehension]

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文章：

Line        Resin is a plant secretion that hardens when
 exposed to air; fossilized resin is called amber.
 Although Pliny in the first century recognized that
 amber was produced from “marrow discharged by
(5)trees,” amber has been widely misunderstood to be
 a semiprecious gem and has even been described
 in mineralogy textbooks. Confusion also persists
 surrounding the term “resin,” which was defined
 before rigorous chemical analyses were available.
(10)Resin is often confused with gum, a substance
 produced in plants in response to bacterial infections,
 and with sap, an aqueous solution transported
 through certain plant tissues. Resin differs from both
 gum and sap in that scientists have not determined a
(15)physiological function for resin.
      In the 1950s, entomologists posited that resin
 may function to repel or attract insects. Fraenkel
 conjectured that plants initially produced resin in
 nonspecific chemical responses to insect attack
(20)and that, over time, plants evolved that produced
 resin with specific repellent effects. But some insect
 species, he noted, might overcome the repellent
 effects, actually becoming attracted to the resin.
 This might induce the insects to feed on those
(25)plants or aid them in securing a breeding site.
 Later researchers suggested that resin mediates
 the complex interdependence, or “coevolution,” of
 plants and insects over time. Such ideas led to the
 development of the specialized discipline of chemical
(30)ecology, which is concerned with the role of plant
 chemicals in interactions with other organisms and
 with the evolution and ecology of plant antiherbivore
 chemistry (plants' chemical defenses against attack
 by herbivores such as insects).


题目：

Of the following topics, which would be most likely to be studied within the discipline of chemical ecology as it is described in the passage?

选项:

A、banks have systematically raised their old fees and invented new ones that are harder and harder for consumers to avoid
B、banks are systematically raising their old fees and inventing new ones that become harder and harder for consumers to avoid
C、banks systematically raising old fees and inventing new ones make them harder and harder for consumers to avoid
D、as banks systematically raised their old fees and invented new ones, avoiding them becomes harder and harder for consumers
E、as banks have systematically raised their old fees and invented new ones, it is becoming harder and harder for consumers to avoid them

答案:

E
1答疑

[Critical Reasoning]

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文章：


题目：

Kernland为了保证未加工的腰果卖到当地的加工厂，向未加工腰果的出口征收非常高的关税。如果关税取消，同时未加工腰果的价格能跟国际接轨的话，那么通过种植腰果，更多的农民可以获利。然而，因为所有的加工厂都在城市里面，所以取消关税的话会严重损害政府对于降低失业率所做的努力。

下面哪个选项，如果正确的话，最能削弱上面的论证？

选项:

A、A. 加工腰果过程中的某些副产品可以用于植物或者塑料的生产。
B、B. 其他自己国内加工腰果的国家一直在补贴它们的加工厂。
C、C. 想比加工腰果，在kernland更多的人选择种植腰果。
D、D. 未加工腰果低于国际价格的这个事情使kernland的加工者们能够让他们的产品卖到有竞争力的价格。
E、E. 因为种植农作物不怎么赚钱了，早起kernland，更多的农民选择抛弃他们的土地然后来到城市。

答案:

E
1答疑

[Reading Comprehension]

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    The Gross Domestic Product. (GDP), which measures the dollar value of finished goods and services produced by an economy during a given period, serves as the chief indicator of the economic well-being of the United States. The GDP assumes that the economic significance of goods and services lies solely in their price, and that these goods and services add to the national well-being, not because of any intrinsic value they may possess, but simply because they were produced and bought. Additionally, only those goods and services involved in monetary transactions are included in the GDP. Thus, the GDP ignores the economic utility of such things as a clean environment and cohesive families and communities, It is therefore not merely coincidental, since nationalpolicies in capitalist and noncapitalist countries alike are dependent on indicators such as the GDP, that both the environment and the social structure have been eroded in recent decades not only does the GDP mask this erosion, it can actually portray it as an economic gain: an oil spill off a coastal region "adds" to the GDP because it generates commercial activity. In short, the nation's central measure of economic well-being works like a calculating machine that adds but cannot subtract.

题目：

The primary purpose of the passage is to

选项:

A、identify ways in which the GDP could be modified so that it would serve as a more accurate indicator of the economic well being of the United states
B、suggest that the GDP, in spite of certain shortcomings, is still the most reliable indicator of the economic well-being of the united states
C、examine crucial shortcomings of the GDP as an indicator of the economic well being of the united States
D、argue that the growth of the United states economy in recent decades has dimin-ished the effectiveness of the GDP as an indicator of the nation's economic well being
E、discuss how the GDP came to be used as the primary indicator of the economic well being of the united states

答案:

C
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[Critical Reasoning]

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题目：

Images from ground-based telescopes are invariably distorted by the Earth's atmosphere. Orbiting space telescopes, however, operating above Earth's atmosphere, should provide superbly detailed images. Therefore, ground-based telescopes will soon become obsolete for advanced astronomical research purposes.

Which of the following statements, if true, would cast the most doubt on the conclusion drawn above?

选项:

答案:

E
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[Critical Reasoning]

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题目：

Reviewer: The book Arts Dedine argues that European painters today lack skills that were common among European painters of preceding centuries. In this the book must be right, since its analysis of 100 paintings, 50 old and 50 contemporary, demonstrates convincingly that none of the contemporary paintings are executed as skillfully as the older paintings.
Which of the following points to the most serious logical flaw in the reviewer's argument?

选项:

A、The paintings chosen by the book's author for analysis could be those that most support the book's thesis.
B、There could be criteria other than the technical ski of the artist by which to evaluate a painting. 
C、The title of the book could cause readers to accept the book's thesis even before they read the analysis of the paintings that supports it. 
D、The particular methods currently used by European painters could require less artistic ski than do methods used by painters in other parts of the world. 
E、A reader who was not familiar with the language of art criticism might not be convinced by the book's analysis of the 100 paintings.

答案:

A
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[Reading Comprehension]

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According to a recent theory, Archean-age gold-quartz vein systems were formed more than two billion years ago from magmatic fluids that originated from molten granite-like bodies deep beneath the surface of the Earth. This theory is contrary to the widely held view that the systems were deposited from metamorphic fluids, that is, from fluids that formed during the dehydration of wet sedimentary rocks.

The recently developed theory has considerable practical importance. Most of the gold deposits discovered during the original gold rushes were exposed at the Earth's surface and were found because they had shed trails of alluvial gold that were easily traced by simple prospecting methods. Although these same methods still lead to an occasional discovery, most deposits not yet discovered have gone undetected because they are buried and have no surface expression.

The challenge in exploration is therefore to unravel the subsurface geology of an area and pinpoint the position of buried minerals. Methods widely used today include analysis of aerial images that yield a broad geological overview; geophysical techniques that provide data on the magnetic, electrical, and mineralogical properties of the rocks being investigated; and sensitive chemical tests that are able to detect the subtle chemical halos that often envelop mineralization. However, none of these high-technology methods are of any value if the sites to which they are applied have never mineralized, and to maximize the chances of discovery the explorer must therefore pay particular attention to selecting the ground formations most likely to be mineralized. Such ground selection relies to varying degrees on conceptual models, which take into account theoretical studies of relevant factors.

These models are constructed primarily from empirical observations of known mineral deposits and from theories of ore-forming processes. The explorer uses the models to identify those geological features that are critical to the formation of the mineralization being modeled, and then tries to select areas for exploration that exhibit as many of the critical features as possible.

题目：

It can be inferred from the passage that which of the following is easiest to detect?

选项:

A、A gold-quartz vein system originating in magmatic fluidsA gold-quartz vein system originating in metamorphic fluids
B、A gold deposit that is mixed with granite
C、A gold deposit that has shed alluvial gold
D、A gold deposit that exhibits chemical halos

答案:

D
1答疑

[Data Sufficiency]

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题目：

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

[Problem Solving]

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题目：

Last week Chris earned x dollars per hour for the first 40 hours worked plus 22 dollars per hour for each hour worked beyond 40 hours. If last week Chris earned a total of 816 dollars by working 48 hours, what is the value of x ?

选项:

A、Public parking areas are evenly distributed along the highways.
B、Truck drivers are most likely not to comply with the federal law if the total time required for a trip exceeds ten hours by less than an hour.
C、In comparison to public rest areas, private parking lots near highways tend to be time-consuming for drivers to reach.
D、Even when rest areas are available, some truck drivers park in places, such as highway access ramps, where their trucks are likely to cause accidents.
E、 Some public parking areas, particularly those on heavily traveled roads, are substantially larger than others.

答案:

D
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[Critical Reasoning]

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文章：

If there is an oil-supply disruption resulting in higher international oil prices, domestic oil prices in open-market counties such as the United States will rise as well, whether such countries import all or none of their oil.

题目：

If the statement above concerning oil-supply disruptions is true, which of the following policies in an open-market nation is most likely to reduce the long-term economic impact on that nation of sharp and unexpected increases in international oil prices?

选项:

A、Maintaining the quantity of oil imported at constant yearly levels Increasing the number of oil tankers in its fleet 
B、Suspending diplomatic relations with major oil-producing nations
C、Decreasing oil consumption through conservation
D、Decreasing domestic production of oil 

答案:

D
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[Critical Reasoning]

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题目：

A drug that is highly effective in treating many types of infection can, at present, be obtained only from the bark of the ibora, a tree that is quite rare in the wild. It takes the bark of 5,000 trees to make one kilogram of the drug. It follows, therefore, that continued production of the drug must inevitably lead to the ibora's extinction.

Which of the following, if true, most seriously weakens the argument above?

选项:

A、The drug made from ibora bark is dispensed to doctors from a central authority.
B、The drug made from ibora bark is expensive to produce.
C、The leaves of the ibora are used in a number of medical products.
D、The ibora can be propagated from cuttings and grown under cultivation.
E、The ibora generally grows in largely inaccessible places.

答案:

D
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359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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1323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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1500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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580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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1342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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957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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640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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652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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153660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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160769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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