问答

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[Reading Comprehension]

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文章：

Line         During the 1980s, many economic historians
  studying Latin America focused on the impact of
  the Great Depression of the 1930s. Most of these
  historians argued that although the Depression
(5) began earlier in Latin America than in the United
  States, it was less severe in Latin America and did
  not significantly impede industrial growth there.
  The historians’ argument was grounded in national
  government records concerning tax revenues and
(10) exports and in government-sponsored industrial
  censuses, from which historians have drawn
  conclusions about total manufacturing output
  and profit levels across Latin America. However,
  economic statistics published by Latin American
(15) governments in the early twentieth century are
  neither reliable nor consistent; this is especially
  true of manufacturing data, which were gathered
  from factory owners for taxation purposes and
  which therefore may well be distorted. Moreover,
(20) one cannot assume a direct correlation between
  the output level and the profit level of a given
  industry as these variables often move in opposite
  directions. Finally, national and regional economies
  are composed of individual firms and industries,
(25) and relying on general, sweeping economic
  indicators may mask substantial variations among
  these different enterprises. For example, recent
  analyses of previously unexamined data on textile
  manufacturing in Brazil and Mexico suggest that the
(30) Great Depression had a more severe impact on this
  Latin American industry than scholars
  had recognized.


题目：

Which of the following conclusions about the Great Depression is best supported by the passage?

选项:

A、It did not impede Latin American industrial growth as much as historians had previously thought.
B、It had a more severe impact on the Brazilian and the Mexican textile industries than it had on Latin America as a region.
C、It affected the Latin American textile industry more severely than it did any other industry in Latin America.
D、The overall impact on Latin American industrial growth should be reevaluated by economic historians.
E、Its impact on Latin America should not be compared with its impact on the United States.

答案:

D
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[Critical Reasoning]

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题目：

During the earliest period of industrialization in Britain, steam engines were more expensive to build and operate than either windmills or water mills, the other practicable sources of power for factories. Yet despite their significant cost disadvantage, steam-powered factories were built in large numbers well before technical improvements brought their cost down. Furthermore, they were built even in regions where geographical conditions permitted the construction of wind- and water-powered factories close to major markets.

Which of the following, if true, most helps to explain the proliferation of steam-powered factories during the earliest period of industrialization in Britain?

选项:

A、In many areas of Britain, there were fewer steam-powered factories than wind- or water-powered factories in the earliest period of industrialization.
B、Unlike wind- or water-powered factories, steam-powered factories were fueled with coal, which sometimes had to be transported significant distances from the mine to the site of the factory.
C、It was both difficult and expensive to convert a factory from wind power or water power to steam power.
D、In the early period of industrialization, many goods sold in towns and cities could not be mass-produced in factories.
E、In Britain, the number of sites where a wind- or water-powered factory could be built was insufficient to provide for all of the demand for factory-produced goods at the time.

答案:

E
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[Sentence Correction]

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题目：

When the temperature of a gas is increased, it is either accompanied by an increase in pressure if the gas is enclosed in a container, or an increase in volume if the gas is able to expand.

选项:

A、 When the temperature of a gas is increased, it is either accompanied by an increase in pressure if the gas is enclosed in a container, or
B、 When the temperature of a gas is increased, it is accompanied either by an increase in pressure if it is enclosed in a container or
C、 When the temperature of a gas is increased, the increase is either accompanied by an increase in pressure if the gas is enclosed in a container or by
D、 Any increase in the temperature of a gas is either accompanied by an increase in pressure if it is enclosed in a container, or by
E、 Any increase in the temperature of a gas is accompanied either by an increase in pressure if the gas is enclosed in a container or by

答案:

E
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[Sentence Correction]

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题目：

The use of the bar code, or Universal Product Code, which was created in part to enable supermarkets to process customers at a faster rate, has expanded beyond supermarkets to other retail outlets and have become readily accepted despite some initial opposition when it was first introduced in 1974.

选项:

A、have become readily accepted despite some initial opposition when it was first introduced in 1974
B、has become readily accepted despite some initial opposition when they were first introduced in 1974
C、have become readily accepted despite some initial opposition when first introduced in 1974
D、has become readily accepted despite some initial opposition when the bar code was first introduced in 1974
E、bar codes have become readily accepted despite some initial opposition when it was first introduced in 1974

答案:

D
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[Critical Reasoning]

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题目：

Archaeologists use technology to analyze ancient sites. It is likely that this technology will advance considerably in the near future, allowing archaeologists to gather more information than is currently possible. If they study certain sites now, they risk contaminating or compromising them for future studies. Therefore, in order to maximize the potential for gathering knowledge in the long run, a team of archaeologists plans to delay the examination of a newly excavated site.

Which of the following would be most useful to investigate for the purpose of evaluating the plan’s prospects for achieving its goal?

选项:

答案:

A
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[Critical Reasoning]

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文章：

Parasitic wasps lay their eggs directly into the eggs of various host insects in exactly the right numbers for any suitable size of host egg.If they laid too many eggs in a host egg, the developing wasp larvae would compete with each other to the death for nutrients and space.If too few eggs were laid, portions of the host egg would decay, killing the wasp larvae.

题目：

Which of the following conclusions can properly be drawn from the information above?

选项:

A、The size of the smallest host egg that a wasp could theoretically parasitize can be determined from the wasp's egg-laying behavior. Host insects lack any effective defenses against the form of predation practiced by parasitic wasps. 
B、Parasitic wasps learn from experience how many eggs to lay into the eggs of different host species.
C、Failure to lay enough eggs would lead to the death of the developing wasp larvae more quickly than would laying too many eggs. 
D、Parasitic wasps use visual clues to calculate the size of a host egg. 

答案:

A
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[Critical Reasoning]

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题目：

Certain messenger molecules fight damage to the lungs from noxious air by telling the muscle cells encircling the lungs' airways to contract.  This partially seals off the lungs.  An asthma attack occurs when the messenger molecules are activated unnecessarily, in response to harmless things like pollen or household dust.
Which of the following, if true, points to the most serious flaw of a plan to develop a medication that would prevent asthma attacks by blocking receipt of any messages sent by the messenger molecules referred to above?

选项:

A、Researchers do not yet know how the body produces the messenger molecules that trigger asthma attacks.
B、Researchers do not yet know what makes one person's messenger molecules more easily activated than another's.
C、Such a medication would not become available for several years, because of long lead times in both development and manufacture.
D、Such a medication would be unable to distinguish between messages triggered by pollen and household dust and messages triggered by noxious air.
E、Such a medication would be a preventative only and would be unable to alleviate an asthma attack once it had started.

答案:

D
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[Critical Reasoning]

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题目：

Which of the following most logically completes the reasoning?
 
Either food scarcity or excessive hunting can threaten a population of animals.  If the group faces food scarcity, individuals in the group will reach reproductive maturity later than otherwise.  If the group faces excessive hunting, individuals that reach reproductive maturity earlier will come to predominate.  Therefore, it should be possible to determine whether prehistoric mastodons became extinct because of food scarcity or human hunting, since there are fossilized mastodon remains from both before and after mastodon populations declined, and ______.

选项:

A、there are more fossilized mastodon remains from the period before mastodon populations began to decline than from after that period
B、the average age at which mastodons from a given period reached reproductive maturity can be established from their fossilized remains
C、it can be accurately estimated from fossilized remains when mastodons became extinct
D、it is not known when humans first began hunting mastodons
E、climate changes may have gradually reduced the food available to mastodons

答案:

B
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[Problem Solving]

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题目：

If 30!/10! is written as the product of consecutive integers, the largest of which is 30, what is the smallest of the integers?

选项:

A、1
B、3
C、7
D、11
E、20

答案:

D
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[Reading Comprehension]

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文章：

Line In their study of whether offering a guarantee of
service quality will encourage customers to visit a
particular restaurant, Tucci and Talaga have found
that the effect of such guarantees is mixed. For
(5) higher-priced restaurants, there is some evidence
that offering a guarantee increases the likelihood of
customer selection, probably reflecting the greater
financial commitment involved in choosing an
expensive restaurant. For lower-priced restaurants,
(10) where one expects less assiduous service, Tucci and
Talaga found that a guarantee could actually have a
negative effect: a potential customer might think that
a restaurant offering a guarantee is worried about
its service. Moreover, since customers understand a
(15) restaurant’s product and know what to anticipate in
terms of service, they are empowered to question its
quality. This is not generally true in the case of skilled
activities such as electrical work, where, consequently,
a guarantee might have greater customer appeal.
(20) For restaurants generally, the main benefit of
a service guarantee probably lies not so much in
customer appeal as in managing and motivating staff.
Staff members would know what service standards
are expected of them and also know that the success
(25) of the business relies on their adhering to those
standards. Additionally, guarantees provide some
basis for defining the skills needed for successful
service in areas traditionally regarded as unskilled,
such as waiting tables.

题目：

It can be inferred that the author of the passage would agree with which of the following statements about the appeal of service guarantees to customers?

选项:

A、Such guarantees are likely to be somewhat more appealing to customers of restaurants than to customers of other businesses.
B、Such guarantees are likely to be more appealing to customers who know what to anticipate in terms of service.
C、Such guarantees are likely to have less appeal in situations where customers are knowledgeable about a business’s product or service.
D、In situations where a high level of financial commitment is involved, a service guarantee is not likely to be very appealing.
E、In situations where customers expect a high level of customer service, a service guarantee is likely to make customers think that a business is worried about its service.

答案:

C
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791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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2411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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2639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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2117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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982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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237403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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