问答

1答疑

[Critical Reasoning]

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题目：

One might expect that within a particular species, any individuals that managed to slow down the aging process would leave more offspring. Natural selection should therefore favor extreme longevity—but this does not seem to be the case. A possible explanation is that aging is a product of the inevitable wear and tear of living, similar to how household appliances generally accumulate faults that lead to their eventual demise. However, most researchers do not find this analogy satisfactory as an explanation.

Which of the following would, if true, provide the strongest explanation for the researchers’ reaction?

选项:

A、Some organisms are capable of living much longer than other organisms.
B、Some organisms reproduce very quickly despite having short lifespans.
C、There are several ways of defining “extreme longevity,” and according to some definitions it occurs frequently.
D、Organisms are capable of maintenance and self-repair and can remedy much of the damage that they accumulate.
E、Some organisms generate much more wear and tear on their bodies than others.

答案:

D
1答疑

[Reading Comprehension]

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文章：

The professionalization of the study of history in the second half of the nineteenth century, including history's transformation from a literary genre to a scientific discipline, had important consequences not only for historians' perceptions of women but also for women as historians.  The disappearance of women as objects of historical studies during this period has elements of irony to it.  On the one hand, in writing about women, earlier historians had relied not on firsthand sources but rather on secondary sources; the shift to more rigorous research methods required that secondary sources be disregarded.  On the other hand, the development of archival research and the critical editing of collections of documents began to reveal significant new historical evidence concerning women, yet this evidence was perceived as substantially irrelevant:  historians saw political history as the general framework for historical writing.  Because women were seen as belonging to the private rather than to the public sphere, the discovery of documents about them, or by them, did not, by itself, produce history acknowledging the contributions of women. In addition, genres such as biography and memoir, those forms of "particular history" that women had traditionally authored, fell into disrepute.  The dividing line between "particular history" and general history was redefined in stronger terms, widening the gulf between amateur and professional practices of historical research.

题目：

According to the passage, the development of archival research and the critical editing of collections of documents had which of the following effects?

选项:

A、Historians increasingly acknowledged women's contributions to history.
B、Historians began to debate whether secondary sources could provide reliable information.
C、Historians began to apply less rigorous scientific research criteria to the study of women's history.
D、More evidence concerning women became available to historical researchers.
E、Women began to study history as professional historians.

答案:

D
1答疑

[Reading Comprehension]

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文章：

Global strategies to control infectious disease have historically included the erection of barriers to international travel and immigration. Keeping people with infectious diseases outside national borders has reemerged as an important public health policy in the human immunodeficiency virus (HIV) epidemic. Between 29 and 50 countries are reported to have introduced border restrictions on HIV-positive foreigners, usually those planning an extended stay in the country, such as students, workers, or seamen.
Travel restrictions have been established primarily by countries in the western Pacific and Mediterranean regions, where HIV seroprevalence is relatively low. However, the country with the broadest policy of testing and excluding foreigners is the United States. From December 1, 1987, when HIV infection was first classified in the United States as a contagious disease, through September 30, 1989, more than 3 million people seeking permanent residence in this country were tested for HIV antibodies. The U.S. policy has been sharply criticized by national and international organizations as being contrary to public health goals and human-rights principles. Many of these organizations are boycotting international meetings in the United States that are vital for the study of prevention, education, and treatment of HIV infection.
The Immigration and Nationality Act requires the Public Health Service to list "dangerous contagious diseases" for which aliens can be excluded from the United States. By 1987 there were seven designated diseases—five of them sexually transmitted (chancroid, gonorrhea, granuloma inguinale, lymphog-ranuloma venereum, and infectious syphilis) and two non-venereal (active tuberculosis and infectious leprosy). On June 8, 1987, in response to a Congressional direction in the Helms Amendment, the Public Health Service added HIV infection to the list of dangerous contagious diseases.
A just and efficacious travel and immigration policy would not exclude people because of their serologic status unless they posed a danger to the community through casual transmission. U.S. regulations should list only active tuberculosis as a contagious infectious disease. We support well-funded programs to protect the health of travelers infected with HIV through appropriate immunizations and prophylactic treatment and to reduce behaviors that may transmit infection.
We recognize that treating patients infected with HIV who immigrate to the United States will incur costs for the public sector. It is inequitable, however, to use cost as a reason to exclude people infected with HIV, for there are no similar exclusionary policies for those with other costly chronic diseases, such as heart disease or cancer.
Rather than arbitrarily restrict the movement of a subgroup of infected people, we must dedicate ourselves to the principles of justice, scientific cooperation, and a global response to the HIV pandemic.

题目：

According to the passage, countries in the western Pacific have

选项:

A、A. a very high frequency of HIV-positive immigrants and have a greater reason to be concerned over this issue than other countries.
B、B. opposed efforts on the part of Mediterranean states to establish travel restrictions on HIV-positive residents.
C、C. a low HIV seroprevalence and, in tandem with Mediterranean regions, have established travel restrictions on HIV-positive foreigners.
D、D. continued to obstruct efforts to unify policy concerning immigrant screening.
E、E. joined with the United States in sharing information about HIV-positive individuals.

答案:

C
1答疑

[Critical Reasoning]

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题目：

Many large department stores in Montalia now provide shopping carts for their customers.  Since customers using shopping carts tend to buy more than those without shopping carts, most of these stores are experiencing strong sales growth, while most other department stores are not.  Therefore, in order to boost sales, managers of Jerrod's, Montalia's premier department store, are planning to purchase shopping carts and make them available to the store's customers next month.
 
Which of the following, if true, casts most doubt whether the managers' plan, if implemented, will achieve its goal?

选项:

A、Since most customers associate shopping carts with low-quality discount stores, Jerrod's high-quality image would likely suffer if shopping carts were introduced.
B、Because the unemployment rate has declined to very low levels, Jerrod's now has to pay significantly higher wages in order to retain its staff.
C、A number of department stores that did not make shopping carts available to their customers have had to close recently due to falling profits.
D、Shopping carts are not very expensive, but they generally need to be replaced every few years.
E、Stores that make shopping carts available to their customers usually have to hire people to retrieve the carts from parking areas.

答案:

A
1答疑

[Critical Reasoning]

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题目：

In the past, most children who went sledding in the winter snow in Verland used wooden sleds with runners and steering bars.  Ten years ago, smooth plastic sleds became popular; they go faster than wooden sleds but are harder to steer and slow.  The concern that plastic sleds are more dangerous is clearly borne out by the fact that the number of children injured while sledding was much higher last winter than it was ten years ago.
 
Which of the following, if true in Verland, most seriously undermines the force of the evidence cited?

选项:

A、A few children still use traditional wooden sleds.
B、Very few children wear any kind of protective gear, such as helmets, while sledding.
C、Plastic sleds can be used in a much wider variety of snow conditions than wooden sleds can.
D、Most sledding injuries occur when a sled collides with a tree, a rock, or, another sled.
E、Because the traditional wooden sled can carry more than one rider, an accident involving a wooden sled can result in several children being injured.

答案:

C
1答疑

[Sentence Correction]

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题目：

Those who come to church with a predisposition to religious belief will be happy in an auditorium or even a storefront, and there is no doubt that religion is sometimes better served by adapted spaces of this kind instead of by some of the buildings actually designed for it.

选项:

A、adapted spaces of this kind instead of by some of the buildings actually designed for it
B、adapted spaces like these rather than some of the buildings actually designed for them
C、these adapted spaces instead of by some of the buildings actually designed for it
D、such adapted spaces rather than by some of the buildings actually designed for them
E、such adapted spaces than by some of the buildings actually designed for it

答案:

E
1答疑

[Critical Reasoning]

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题目：

A mosquito bite can transmit to a person the parasite that causes malaria, and the use of mosquito nets over children's beds can significantly reduce the incidence of malarial infection for children in areas where malaria is common.  Yet public health officials are reluctant to recommend the use of mosquito nets over children's beds in such areas.
 
Which of the following, if true, would provide the strongest grounds for the public health officials' reluctance?

选项:

A、Early exposure to malaria increases the body's resistance to it and results in a lesser likelihood of severe life-threatening episodes of malaria.
B、Mosquito bites can transmit to people diseases other than malaria.
C、Mosquito nets provide protection from some insect pests other than mosquitoes.
D、Although there are vaccines available for many childhood diseases, no vaccine has been developed that is effective against malaria.
E、The pesticides that are most effective against mosquitoes in regions where malaria is common have significant detrimental effects on human health.

答案:

A
1答疑

[Table Analysis]

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文章：

The table gives the types and measurements, in feet, for 20 trees that were nominated for the Big Tree Contest in a certain county. Circumference is the distance around the trunk of a tree measured 4.5 feet above the ground; height is the vertical distance from the ground to the top of the tree; and spread is the distance from the ends of the branches on one side of the tree through the trunk to the ends of the branches on the other side of the tree at the horizontal level where that distance is greatest.

Type of tree Circumference Height Spread
Alder, European   9.00   70   41.00
Ash, White 13.83   91   82.00
Cottonwood, Eastern 32.67   66 107.75
Elm, Siberian 17.42   88   70.00
Fir, Douglas   8.17   80   43.00
Ginkgo 12.92   85   76.50
Hickory, Shagbark   9.75   79   38.25
Hophornbeam   4.83   55   38.25
Locust, Honey 17.33 102 123.50
Magnolia, Cucumber 24.42   75   83.00
Maple, Black 16.83   67   88.00
Mulberry, White 18.42   52   72.00
Oak, Black 15.00   85   96.50
Oak, Bur 16.42   78   99.00
Oak, Northern Red 17.67   79   82.50
Oak, Pin 14.08 102   75.50
Pine, Scotch 13.67   60   63.50
Sweetgum, American 10.08   59   48.00
Sycamore, American 22.08 102   82.25
Walnut, Black 13.33 107   74.00

题目：

For each statement, select Yes if the information given indicates it is true for the trees in the table. Otherwise, select No.

选项:

A、Trunk circumference is directly proportional to height.
B、The mode height is 102 feet.
C、If a tree is chosen at random from the 20 trees in the table, the likelihood that it will have a circumference less than 10 feet is 0.20.

答案:

B A A
1答疑

[Reading Comprehension]

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文章：

(This passage is excerpted from material published in a1997.)

    Whereas United States economic productivity grew at an annual rate of 3 percent from 1945 to 1965,it has grown at an annual rate of only about 1 percent since the early 1970's. What might be preventing higher productivity growth? Clearly, the manufacturing sector of the economy cannot be blamed. Since1980, productivity improvements in manufacturing have moved the United States from a position of acute decline in manufacturing to one of world prominence. Manufacturing, however, constitutes a relatively small proportion of the economy. In 1992, goods-producing businesses employed only 19.1 percent of American workers, whereas service-producing businesses employed 70 percent. Although the service sector has grown since the late 1970's, its productivity growth has declined.

    Several explanations have been offered for this decline and for the discrepancy in productivity growth between the manufacturing and service sectors. One is that traditional measures fail to reflect service-sector productivity growth because it has been concentrated in improved quality of services. Yet traditional measures of manufacturing productivity have shown significant increases despite the under measurement of quality, where as service productivity has continued to stagnate. Others argue that since the 1970's, manufacturing workers, faced with strong foreign competition, have learned to work more efficiently in order to keep their jobs in the United States, but service workers, who are typically under less global competitive pressure, have not. However, the pressure on manufacturing workers in the United States to work more efficiently has generally been overstated, often for political reasons. In fact, while some manufacturing jobs have been lost due to foreign competition, many more have been lost simply because of slow growth in demand for manufactured goods.

    Yet another explanation blames the federal budget deficit: if it were lower, interest rates would be lower too, thereby increasing investment in the development of new technologies, which would spur productivity growth in the service sector. There is, however, no dearth of technological resources; rather, managers in the service sector fail to take advantage of widely available skills and machines. High productivity growth levels attained by leading-edge service companies indicate that service-sector managers who wisely implement available technology and choose skillful workers can significantly improve their companies' productivity. The culprits for service-sector productivity stagnation are the forces-such as corporate takeovers and unnecessary governmental regulation-that distract managers from the task of making optimal use of available resources.

题目：

The passage states which of the following about the effect of foreign competition on the American manufacturing sector since the 1970's?

选项:

A、It has often been exaggerated.
B、It has not been a direct cause of job loss.
C、It has in large part been responsible for the subsequent slowing of productivity growth.
D、It has slowed growth in the demand for manufactured goods in the United States.
E、It has been responsible for the majority of American jobs lost in manufacturing.

答案:

A
1答疑

[Multi-Source Reasoning]

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文章：

Kenyan IPO pricing

    Researchers recently examined the initial public offering (IPO)—a private firm's first sale of stock shares to the public—of firms listed on Kenya's Nairobi Stock Exchange (NSE) between 1994 and 2008. During this time, the number of IPOs listed per year varied from zero to four The researchers wanted to exam­ine the extent to which four different variables—investor sentiment, firm size, board prestige, and firm age—affected the IPO stock share price, which is set by the firm. They hypothesized that all four variables would show a strong positive correlation with this IPO asking price. However, after examining the firms listed, they were surprised to find that none of the variables showed a strong positive correlation with IPO pricing, and in fact investor sentiment and board prestige both showed a strong negative correlation.

    The researchers also discovered that nearly all of these IPOs were underpriced by an aver­age of 50 percent, which is to say the IPO share prices were about half of what the share prices were at the close of that first day of trading. Such underpricing constitutes a loss to the listed firm because the firm could have immediately raised more money with a higher price. The researchers noted that firms should take care to set an IPO price low enough to capture investor interest but high enough to generate sufficient capital for the firm.

Kenyan IPOs, 1994-2008

    The table lists companies, examined by the researchers, that had their IPO on the NSE between 1994 and 2008, together with the IPO share price, first day closing price, and percent underpricing. Prices are in Kenyan shillings.

题目：

7. For each of the following statements, select Inferable if the statement is reasonably inferable form the information provided about the NSE IPOs. Otherwise select Not inferable.

选项:

A、IPOs of firms with prestigious boards were more likely to be underpriced than those of other firms.
B、Firestone East Africa set its IPO price slightly lower than it should have.
C、At least one of the firms examined by the researchers did not have an underpriced IPO.

答案:

B B A
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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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564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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[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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631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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636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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[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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