问答

2答疑

[Critical Reasoning]

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题目：

Columnist:  People should avoid using a certain artificial fat that has been touted as a resource for those whose medical advisers have advised them to reduce their fat intake.  Although the artificial fat, which can be used in place of fat in food preparation, has none of the negative health effects of fat, it does have a serious drawback:  it absorbs certain essential vitamins, thereby preventing them from being used by the body.
 
In evaluating the columnist's position, it would be most useful to determine which of the following?

选项:

A、Whether increasing one's intake of the vitamins can compensate for the effects of the artificial fat
B、Whether the vitamins that the artificial fat absorbs are present in foods that contain the fat
C、Whether having an extremely low fat intake for an extended period can endanger the health
D、Whether there are any foods that cannot be prepared using the artificial fat as a substitute for other fats
E、Whether people are generally able to detect differences in taste between foods prepared using the artificial fat and foods that are similar except for the use of other fats

答案:

A
2答疑

[Data Sufficiency]

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题目：

If I and k are lines in the xy-plane, is the product of the slopes of l and k equal to -1 ?
(1) Line I passes through the origin and the point (1, 2).
(2) Line k has x-intercept 4 and y-intercept 2.

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
2答疑

[Sentence Correction]

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题目：

The four-million-year-old fossilized skeleton known as Lucy is so small compared with many other skeletons presumed to be of the same species, and so some paleontologists have argued that Lucy represents a different lineage.

选项:

A、presumed to be of the same species, and so
B、presumed to be of the same species that
C、presumed that they are of the same species, and so
D、that they have presumed to be of the same species, so that
E、that they have presumed are of the same species, and

答案:

B
2答疑

[Reading Comprehension]

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文章：

    Earth's surface consists of rigid plates that are constantly shifting and jostling one another. Plate movements are the surface expressions of motions in the mantle—the thick shell of rock that lies between Earth's crust and its metallic core. Although the hot rock of the mantle is a solid, under the tremendous pressure of the crust and overlying rock of the mantle, it flows like a viscous liquid. The mantle's motions, analogous to those in a pot of boiling water, cool the mantle by carrying hot material to the surface and returning cooler material to the depths. When the edge of one plate bends under another and its cooler material is consumed in the mantle, volcanic activity occurs as molten lava rises from the downgoing plate and erupts through the overlying one.

    Most volcanoes occur at plate boundaries. However, certain "misplaced" volcanoes far from plate edges result from a second, independent mechanism that cools the deep interior of Earth. Because of its proximity to Earth's core, the rock at the base of the mantle is much hotter than rock in the upper mantle. The hotter the mantle rock is, the less it resists flowing. Reservoirs of this hot rock collect in the base of the mantle. When a reservoir is sufficiently large, a sphere of this hot rock forces its way up through the upper mantle to Earth's surface, creating a broad bulge in the topography. The "mantle plume" thus formed, once established, continues to channel hot material from the mantle base until the reservoir is emptied. The surface mark of an established plume is a hot spot—an isolated region of volcanoes and uplifted terrain located far from the edge of a surface plate. Because the source of a hot spot remains fixed while a surface plate moves over it, over a long period of time an active plume creates a chain of volcanoes or volcanic islands, a track marking the position of the plume relative to the moving plate. The natural history of the Hawaiian island chain clearly shows the movement of the Pacific plate over a fixed plume.

题目：

The author's reference to the Hawaiian Islands serves primarily to

选项:

A、provide an example of a type of volcanic activity that does not occur elsewhere
B、identify the evidence initially used to establish that the Pacific plate moves
C、call into question a theory about the source of the volcanoes that created the Hawaiian Islands
D、illustrate the distance from plate edges at which volcanoes typically appear
E、provide an example of how mantle plumes manifest themselves on Earth's surface

答案:

E
2答疑

[Sentence Correction]

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题目：

Biologists working in Spain say that their discovery of teeming life in a highly acidic river may not only broaden the search for life, or for evidence of past life, no other planets but also show that a number of forms of microscopic life can adapt to conditions that scientists have long thought hostile to all but the hardiest bacteria.

选项:

A、show that a number of forms of microscopic life can adapt to conditions that scientists have long thought hostile to all but the hardiest bacteria
B、may show that a number of forms of microscopic life is capable of adapting to conditions that scientists have long thought hostile to all bacteria but the hardiest ones
C、shows a number of forms of microscopic life to be capable to adapt to conditions that scientists have long thought had been hostile to all but the hardiest bacteria
D、showing that a number of forms of microscopic life is capable of adapting to conditions that scientists have long thought had been hostile to all but the hardiest bacteria
E、showing that a number of forms of microscopic life can adapt to conditions that scientists have long thought hostile to all bacteria but the hardiest

答案:

A
2答疑

[Reading Comprehension]

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文章：

题目：

Which of the following, if true, would most clearly support the contention attributed to SPEW in lines 17–20?

选项:

A、Those white lead factories that most strongly enforced regulations concerning worker safety and hygiene had the lowest incidences of lead poisoning among employees.
B、The incidence of lead poisoning was much higher among women who worked in white lead factories than among women who worked in other types of factories.
C、There were many household sources of lead that could have contributed to the incidence of lead poisoning among women who also worked outside the home in the late nineteenth century.
D、White lead factories were more stringent than were certain other types of factories in their enforcement of workplace safety regulations.
E、Even brief exposure to the conditions typically found in white lead factories could cause lead poisoning among factory workers.

答案:

A
2答疑

[Critical Reasoning]

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题目：

In the past the country of Malvernia has relied heavily on imported oil. Malvernia recently implemented a program to convert heating systems from oil to natural gas. Malvernia currently produces more natural gas each year than it uses, and oil production in Malvernian oil fields is increasing at a steady pace. If these trends in fuel production and usage continue, therefore, Malvernian reliance on foreign sources for fuel is likely to decline soon.

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

选项:

A、When, if ever, will production of oil in Malvernia outstrip production of natural gas?
B、Is Malvernia among the countries that rely most on imported oil?
C、What proportion of Malvernia’s total energy needs is met by hydroelectric, solar, and nuclear power?
D、Is the amount of oil used each year in Malvernia for generating electricity and fuel for transportation increasing?
E、Have any existing oil-burning heating systems in Malvernia already been converted to natural-gas-burning heating systems?

答案:

D
2答疑

[Sentence Correction]

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题目：

Similar to other early Mississippi Delta blues singers, the music of Robert Johnson arose from an oral tradition beginning with a mixture of chants, fiddle tunes, and religious music and only gradually evolved into the blues.

选项:

A、Similar to other early Mississippi Delta blues singers, the music of Robert Johnson arose from an oral tradition beginning with
B、Similar to that of other early Mississippi Delta blues singers, Robert Johnson made music that arose from an oral tradition that began with
C、As with other early Mississippi Delta blues singers, Robert Johnson made music that arose from an oral tradition beginning as
D、Like other early Mississippi Delta blues singers, Robert Johnson’s music arose from an oral tradition beginning with
E、Like the music of other early Mississippi Delta blues singers, the music of Robert Johnson arose from an oral tradition that began as

答案:

E
2答疑

[Critical Reasoning]

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文章：

Scientists typically do their most creative work before the age of forty. It is commonly thought that this happens because aging by itself brings about a loss of creative capacity. However, studies show that of scientists who produce highly creative work beyond the age of forty, a disproportionately large number entered their fi eld at an older age than is usual. Since by the age of forty the large majority of scientists have been working in their fi eld for at least fifteen years, the studies' finding strongly suggests that the real reason why scientists over forty rarely produce highly creative work is not that they have aged but rather that scientists over forty have generally spent too long in their field.

题目：

In the argument given, the two portions in boldface play which of the following roles?

选项:

A、The first is a claim, the accuracy of which is at issue in the argument; the second is a conclusion drawn on the basis of that claim.The first is an objection that has been raised against a position defended in the argument; the second is that position
B、The first is evidence that has been used to support an explanation that the argument challenges; the second is that explanation.
C、The first is evidence that has been used to support an explanation that the argument challenges; the second is a competing explanation that the argument favors. 
D、The first provides evidence to support an explanation that the argument favors; the second is that explanation

答案:

E
2答疑

[Critical Reasoning]

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题目：

The Hyksos invaded the Nile Delta of Egypt and ruled it from 1550 B.C Their origin is uncertain, but archaeologists hypothesize that they were Canaanites. In support of this hypothesis, the archaeologists point out that excavations of Avans, the Hyksos capital in Egypt, have uncovered large numbers of artifacts virtually identical to artifacts produced in Ashkelon, and Ashkelon was a major city of Canaan at the time of the Hyksos' invasion.
 
In order to evaluate the force of the archaeologists evidence ,it would useful to determine which of the following ?

选项:

A、Whether artifacts from Ashkelon were widely traded to non-Canaanite cities
B、Whether significant numbers of artifacts that do not resemble artifacts produced in Ashkelon have been found at Avaris
C、Whether Avaris was the nearest Hyksos city in Egypt to Canaan
D、Whether Ashkelon after 1550 B.C. continued to produce artifacts similar to whose  found at Avaris
E、Whether any artifacts produced by the Hyksos after 1550 B.C .have been found in Egypt

答案:

A
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422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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1450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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1621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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621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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1428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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1011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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674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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691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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160928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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168037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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