问答

4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：

The author of the passage refers to Pliny most probably in order to

选项:

A、now at a lower rate than
B、now lower than
C、now a lower rate than
D、presently lower than it was
E、presently lower than the rate was

答案:

D
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[Sentence Correction]

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题目：

The government predicts that, for consumers and businesses that make a large number of long-distance calls, the Federal Communications Commission's recent telephone rate cuts will greatly reduce costs, though some consumer groups disagree with the government's estimates, suggesting they are too optimistic.

选项:

A、 The government predicts that, for consumers and businesses that make a large number of long-distance calls, the Federal Communications Commission's recent telephone rate cuts will greatly reduce costs
B、 The government predicts that costs will be greatly reduced for consumers and businesses that make a large number of long-distance calls by the Federal Communications Commission's recent telephone rate cuts
C、 The government's prediction is, for consumers and businesses making a large number of long-distance calls, costs will be greatly reduced by the recent telephone rate cuts made by the Federal Communications Commission
D、 For consumers and businesses that make a large number of long-distance calls, the government's prediction that the Federal Communications Commission's recent telephone rate cuts will greatly reduce costs
E、 For consumers and businesses making a large number of long-distance calls, the government predicts that the recent telephone rate cuts that the Federal Communications Commission has made will greatly reduce costs

答案:

A
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[Sentence Correction]

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题目：

In a speech before the Senate Banking Committee, the chairman of the Federal Reserve painted an optimistic picture of the economy, suggesting to investors the central bank in the near future is not lowering interest rates.

选项:

A、suggesting to investors the central bank in the near future is not lowering interest rates
B、suggesting to investors that the central bank would not lower interest rates in the near future
C、which suggests that to investors in the near future interest rates will not be lowered by the central bank
D、with the suggestion to investors in the near future that interest rates would not be lowered by the central bank
E、with the suggestion to investors of interest rates not being lowered in the near future by the central bank

答案:

B
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[Sentence Correction]

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题目：

Between 14,000 and 8,000 b.c. the ice cap that covered northern Asia, Europe, and America began to melt, uncovering vast new areas that were to be occupied by migrating peoples moving northward.

选项:

A、began to melt, uncovering vast new areas that were to be occupied
B、began melting, to uncover vast new areas to be occupied
C、began, by melting, to uncover vast new areas for occupation
D、began, after melting, uncovering vast new areas which are to be occupied
E、would begin to uncover, through melting, vast new areas for occupation

答案:

A
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[Problem Solving]

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题目：

A positive integer n is said to be "prime-saturated" if the product of all the different positive prime factors of n is less than the square root of n. What is the greatest two-digit prime-saturated integer?

选项:

A、99
B、98
C、97
D、96
E、95

答案:

D
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[Sentence Correction]

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题目：

 George Washington Carver dedicated his life to the economic strengthening of the South with improvement of soil and diversification of crops.

选项:

A、the economic strengthening of the South with improvement of soil and diversification of crops 
B、strengthening the economy in the South with soil improvement and the diversification of crops 
C、strengthening the economy of the South through soil improvement and crop diversification 
D、the strengthening of the economy of the South through improving soil and crop diversifying 
E、the economic strengthening in the South with improving soil and diversifying crops

答案:

C
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[Sentence Correction]

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题目：

Based on records from ancient Athens, each year young Athenian women collaborated to weave a new woolen robe that they used to dress a statue of the goddess Athena and that this robe depicted scenes of a battle between Zeus, Athena's father, and giants.

选项:

A、 Based on records from ancient Athens, each year young Athenian women collaborated to weave a new woolen robe that they used to dress
B、 Based on records from ancient Athens, each year young Athenian women had collaborated to weave a new woolen robe with which to dress
C、 According to records from ancient Athens, each year young Athenian women collaborated to weave a new woolen robe that they used to dress
D、 Records from ancient Athens indicate that each year young Athenian women collaborated to weave a new woolen robe with which they dressed
E、 Records from ancient Athens indicate each year young Athenian women had collaborated to weave a new woolen robe for dressing

答案:

D
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[Critical Reasoning]

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题目：

Which of the following most logically completes the passage?
 
A certain tropical island received food donations in the form of powdered milk for distribution to its poorest residents, who were thought to be malnourished.  Subsequently, the rate of liver cancers among those islanders increased sharply.  The donated milk was probably to blame: recent laboratory research on rats has shown that rats briefly exposed to the substances aflatoxin tend to develop liver cancer when fed casein, a milk protein.  This result is relevant because _______.

选项:

A、in the tropics, peanuts, a staple of these island residents, support a mold growth that produces aflatoxin
B、the liver is more sensitive to carcinogens, of which aflatoxin may be one, than most other bodily organs
C、casein is not the only protein contained in milk
D、powdered milk is the most appropriate form in which to send milk to a tropical destination
E、the people who were given the donated milk had been screened for their ability to digest milk

答案:

A
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题目：

Giuseppe Alessi, a world-class chef whose life has been a search for the genuine and the delicious in Florentine cooking, is an accomplished scholar not only unearthing many of his recipes from medieval and Renaissance manuscripts but also a poet and philosopher who draws his inspiration from the idyllic frescoes of Etruscan tombs.

选项:

A、not only unearthing many of his recipes from medieval and Renaissance manuscripts but also a poet and philosopher who draws
B、unearthing many of his recipes both from medieval and Renaissance manuscripts, as well as a poet and a philosopher who draws
C、who unearths many of his recipes from medieval and Renaissance manuscripts, as well as a poet and a philosopher who draws
D、who unearths many of his recipes from medieval and Renaissance manuscripts, but also a poet and a philosopher drawing
E、who unearths many of his recipes from medieval and  Renaissance manuscripts, a poet and philosopher drawing

答案:

C
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[Critical Reasoning]

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题目：

Film Director:  It is true that certain characters and plot twists in my newly released film The Big Heist are strikingly similar to characters and plot twists in Thieves, a movie that came out last year.  Based on these similarities, the film studio that produced Thieves is now accusing me of taking ideas from that film.  The accusation is clearly without merit.  All production work on The Big Heist was actually completed months before Thieves was released.
 
Which of the following, if true, provides the strongest support for the director's rejection of the accusation?

选项:

A、Before Thieves began production, its script had been circulating for several years among various film studios, including the studio that produced The Big Heist.
B、The characters and plot twists that are most similar in the two films have close parallels in many earlier films of the same genre.
C、The film studio that produced Thieves seldom produces films in this genre.
D、The director of Thieves worked with the director of The Big Heist on several earlier projects.The time it took to produce .
E、 The Big Heist was considerably shorter than the time it took to produce Thieves.

答案:

B
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[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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[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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[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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[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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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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Analytical!
请问may老师，这题该用什么思路来做？
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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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