问答

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[Sentence Correction]

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题目：

Only seven people this century have been killed by the great white shark,  the man-eater of the movies—less than those killed by bee stings.

选项:

A、movies—less than those
B、movies—fewer than have been
C、movies, which is less than those
D、movies, a number lower than the people
E、movies, fewer than the ones

答案:

B
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[Reading Comprehension]

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文章：

A recent study has provided clues to predator-prey dynamics in the late Pleistocene era.  Researchers compared the number of tooth fractures in present-day carnivores with tooth fractures in carnivores that lived 36,000 to 10,000 years ago and that were preserved in the Rancho La Brea tar pits in Los Angeles.  The breakage frequencies in the extinct species were strikingly higher than those in the present-day species.
 
In considering possible explanations for this finding, the researchers dismissed demographic bias because older individuals were not overrepresented in the fossil samples.  They rejected preservational bias because a total absence of breakage in two extinct species demonstrated that the fractures were not the result of abrasion within the pits.  They ruled out local bias because breakage data obtained from other Pleistocene sites were similar to the La Brea data.  The explanation they consider most plausible is behavioral differences between extinct and present-day carnivores--in particular, more contact between the teeth of predators and the bones of prey due to more thorough consumption of carcasses by the extinct species.  Such thorough carcass consumption implies to the researchers either that prey availability was low, at least seasonally, or that there was intense competition over kills and a high rate of carcass theft due to relatively high predator densities.

题目：

The primary purpose of the passage is to

选项:

A、present several explanations for a well-known fact
B、suggest alternative methods for resolving a debate
C、argue in favor of a controversial theory
D、question the methodology used in a study
E、discuss the implications of a research finding

答案:

E
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题目：

A South American bird that forages for winged termites and other small insects while swinging upside down form the foliage of tall trees, the graveteiro belongs to the ovenbird family, a group of New World tropical birds that includes more than 230 species and that are represented in virtually every kind of habitat.

选项:

A、graveteiro belongs to the ovenbird family, a group of New World tropical birds that includes more than 230 species and that are
B、graveteiro belongs to the ovenbird family, a group of New World tropical birds that includes more than 230 species and  is
C、graveteiro belongs to the ovenbird family, a group of New World tropical birds that include more than 230 species and  is
D、graveteiro, which belongs to the ovenbird family, a group of New World tropical birds that includes more than 230 species and that are
E、graveteiro, which belongs to the ovenbird family, a group of New World tropical birds that includes more than 230 species and is

答案:

B
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题目：

In 1713, Alexander Pope began his translation of the Iliad, a work that, taking him seven years until completion, and that literary critic Samuel Johnson, Pope's contemporary, pronounced the greatest translation in any language.

选项:

A、his translation of the Iliad, a work that, taking him seven years until completion, and that literary critic Samuel Johnson, Pope's contemporary, pronounced
B、his translation of the Iliad, a work that took him seven years to complete and that literary critic Samuel Johnson, Pope's contemporary, pronounced
C、his translation of the Iliad, a work that had taken seven years to complete and that literary critic Samuel Johnson, Pope's contemporary, pronounced it as
D、translating the Iliad, a work that took seven years until completion and that literary critic Samuel Johnson, Pope's contemporary, pronounced it as
E、translating the Iliad, a work that had taken seven years to complete and literary critic Samuel Johnson, Pope's contemporary, pronounced it

答案:

B
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题目：

Since 1990 the global economy has grown more than it did during the 10,000 years from the beginning of agriculture to 1950.

选项:

A、Since 1990 the global economy has grown more than it did during the 10,000 years from the beginning of agriculture
B、Since 1990 the growth of the global economy has been more than that during 10,000 years, from when agriculture began
C、The growth of the global economy since 1990 exceeds that which had been for 10,000 years from the beginning of agriculture
D、The growth of the global economy since 1990 exceeds what it has been for 10,000 years, from when agriculture began
E、The growth of the global economy since 1990 exceeds what it did for the 10,000 years from the beginning of agriculture

答案:

A
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[Critical Reasoning]

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题目：

Coffee shop owner: A large number of customers will pay at least the fair market value for a cup of coffee, even if there is no formal charge. Some will pay more than this out of appreciation of the trust that is placed in them. And our total number of customers is likely to increase. We could therefore improve our net cash flow by implementing an honor system in which customers pay what they wish for coffee by depositing money in a can.

Manager: We’re likely to lose money on this plan. Many customers would cheat the system, paying a very small sum or nothing at all.

Which of the following, if true, would best support the owner’s plan, in light of the manager’s concern?

选项:

A、The new system, if implemented, would increase the number of customers.
B、By roasting its own coffee, the shop has managed to reduce the difficulties (and cost) of maintaining an inventory of freshly roasted coffee.
C、Many customers stay in the cafe for long stretches of time.
D、The shop makes a substantial profit from pastries and other food bought by the coffee drinkers.
E、No other coffee shop in the area has such a system.

答案:

D
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[Reading Comprehension]

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文章：

Line         Manufacturers have to do more than build large
  manufacturing plants to realize economies of scale.
  It is true that as the capacity of a manufacturing
  operation rises, costs per unit of output fall as plant
(5) size approaches “minimum efficient scale,” where the
  cost per unit of output reaches a minimum,
  determined roughly by the state of existing technology
  and size of the potential market. However, minimum
  efficient scale cannot be fully realized unless a steady
(10) “throughput” (the flow of materials through a plant) is
  attained. The throughput needed to maintain the
  optimal scale of production requires careful
  coordination not only of the flow of goods through the
  production process, but also of the flow of input from
(15) suppliers and the flow of output to wholesalers and
  final consumers. If throughput falls below a critical
  point, unit costs rise sharply and profits disappear. A
  manufacturer’s fixed costs and “sunk costs” (original
  capital investment in the physical plant) do not
(20) decrease when production declines due to inadequate
  supplies of raw materials, problems on the factory
  floor, or inefficient sales networks. Consequently,
  potential economies of scale are based on the
  physical and engineering characteristics of the
(25) production facilities—that is, on tangible capital—but
  realized economies of scale are operational and
  organizational, and depend on knowledge, skills,
  experience, and teamwork—that is, on organized
  human capabilities, or intangible capital.
(30)      The importance of investing in intangible capital
  becomes obvious when one looks at what happens in
  new capital-intensive manufacturing industries. Such
  industries are quickly dominated, not by the first firms
  to acquire technologically sophisticated plants of
(35) theoretically optimal size, but rather by the first to
  exploit the full potential of such plants. Once some
  firms achieve this, a market becomes extremely hard
  to enter. Challengers must construct comparable
  plants and do so after the first movers have already
(40) worked out problems with suppliers or with new
  production processes. Challengers must create
  distribution networks and marketing systems in
  markets where first movers have all the contacts and
  know-how. And challengers must recruit management
(45) teams to compete with those that have already
  mastered these functional and strategic activities.


题目：

The primary purpose of the passage is to

选项:

A、point out the importance of intangible capital for realizing economies of scale in manufacturing
B、show that manufacturers frequently gain a competitive advantage from investment in large manufacturing facilities
C、argue that large manufacturing facilities often fail because of inadequate investment in both tangible and intangible capital
D、suggest that most new industries are likely to be dominated by firms that build large manufacturing plants early
E、explain why large manufacturing plants usually do not help manufacturers achieve economies of scale

答案:

A
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[Problem Solving]

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题目：

选项:
A、
B、
C、3
D、6
E、

答案:

C
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[Reading Comprehension]

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文章：

    The idea that equipping homes with electrical appliances and other "modern" household technologies would eliminate drudgery, save labor time, and increase leisure for women who were full-time home workers remained largely unchallenged until the women's movement of the 1970's spawned the groundbreaking and influential works of sociologist Joann Vanek and historian Ruth Cowan. Vanek analyzed 40 years of timeuse surveys conducted by home economists to argue that electrical appliances and other modern household technologies reduced the effort required to perform specific tasks, but ownership of these appliances did not correlate with less time spent on housework by full-time home workers. In fact, time spent by these workers remained remarkably constant―at about 52 to 54 hours per week―from the 1920's to the 1960's, a period of significant change in household technology. In surveying two centuries of household technology in the United States, Cowan argued that the "industrialization" of the home often resulted in more work for full-time home workers because the use of such devices as coal stoves, water pumps, and vacuum cleaners tended to reduce the workload of married-women's helpers (husbands, sons, daughters, and servants) while promoting a more rigorous standard of housework. The full-time home worker's duties also shifted to include more household management, child care, and the post-Second World War phenomenon of being "Mom's taxi."

题目：

According to the passage, which of the following is true about the idea mentioned in the highlighted text?

选项:

A、It has been undermined by data found in time-use surveys conducted by home economists.
B、It was based on a definition of housework that was explicitly rejected by Vanek and Cowan.
C、It is more valid for the time period studied by Cowan than for the time period studied by Vanek.
D、It is based on an underestimation of the time that married women spent on housework prior to the industrialization of the household.
E、It inaccurately suggested that new household technologies would reduce the effort required to perform housework.

答案:

A
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[Critical Reasoning]

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题目：

The cause of the wreck of the ship Edmund Fitzgerald in a severe storm on lake Superior is still unknown , when the sunken wreckage of the vessel was round , searchers discovered the hull in two pieces lying close together , The storm's violent waves would have caused separate pieces floating even briefly on the surface to drift apart . Therefore . the breakup of the null can be ruled out as the cause of the sinking .
 
Which of the following is an assumption on which the argument depends?

选项:

A、Ships as large as the Edmund Fitzgerald rarely sink except in the most violent weather.
B、Under water currents at the time of the storm did not move the sepa-rated pieces of the hull together again .
C、Pieces of the hull would have sunk more quickly than the intact hull would have
D、The waves of the storm were not violent enough to have caused the
E、If the ship broke up before sinking , the pieces of the hull would not have remained on the surface for very long

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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[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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[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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