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OG18-数学分册 $$\frac{(39,897)(0.0096)}{198.76}$$ is approximately
OG18-数学分册 $$\sqrt{16+16}$$
OG18-数学分册 Points A, B, C, and D, in that order, lie on a line. If AB = 3 cm, AC = 4 cm, and BD = 6 cm, what is CD, in centimeters?
OG18-数学分册 GMAT、gmat题库、gmat模考、gmat考满分As shown in the diagram above, a lever resting on a fulcrum has weights of $$w_{1} $$ pounds and $$w_{2}$$ pounds, located $$d_{1}$$ feet and $$d_{2}$$ feet from the fulcrum. The lever is balanced and $$w_{1}d_{1} = w_{2}d_{2}$$. Suppose $$w_{1}$$ is 50 pounds and $$w_{2}$$ is 30 pounds. If $$d_{1}$$ is 4 feet less than $$d_{2}$$, what is $$d_{2}$$, in feet?
OG18-数学分册 When 24 is divided by the positive integer n, the remainder is 4. Which of the following statements about n must be true?I. n is even.II. n is a multiple of 5.III. n is a factor of 20.
OG19 OG20 OG2022 The symbol $$\Delta$$ denotes one of the four arithmetic operations: subtraction, multiplication, or division. If 6 $$\Delta$$ 3 $$\le$$ 3, which of the following must be true? I. 2 $$\Delta$$ 2=0 II. 2 $$\Delta$$ 2=1 III. 4 $$\Delta$$ 2=2
The symbol $$\Delta$$ denotes one of the four arithmetic operations: addition, subtraction, multiplication, or division. If 6 $$\Delta 3 \le 3$$, which of the following must be true? I. 2 $$\Delta$$ 2=0 II. 2 $$\Delta$$ 2=1 III. 4 $$\Delta$$ 2=4
OG18 OG19 OG20 OG2022 Is the product of two positive integers x and y divisible by the sum of x and y?(1) x=y(2) x=2
OG18 OG19 OG20 OG2022 Max purchased a guitar for a total of $624, which consisted of the price of the guitar and the sales tax. Was the sale tax rate greater than 3 percent?(1) The price of the guitar that Max purchased was less than $602.(2) The sales tax for the guitar that Max purchased was less than $30.
1/x<1/x³? (1)x>0 (2)x<1
C13

With globalization, "sustainable development" is concerned not only with economic development but also with the development and resolution of social and environmental problems. Despite different interpretations, the number of companies in the world that are realizing the economic benefits of CSR (Corporate Social Responsibility) policies has been on the rise in the past decade. CSR commitments go beyond the desire for higher profit and show that businesses are fully aware of their responsibilities to employees, customers, community and the environment. Many companies use CSR as a new business approach when they realize that it can help enhance the role of managers, improve financial situations, strengthen the motivation of staff, inspire customer loyalty, and bolster corporate reputation in society.

The challenges facing world companies from the application of CSR are clear. The CSR awareness of a company may be considered an index proportional to the success of that company on the path of development. Multinational corporations or powerful companies apply a set of rules outlining responsibilities or proper practices (called a code of conduct or code of ethics) and standards like SA8000, WRAP, ISO 14000 and GRI, and regard them as their commitments to the world. Titans are paying highly for an ideal business model with a highly competitive system, sustainable development and more social responsibility. For example, Best Buy — the international retailer of consumer electronics and entertainment software — is famous for applying a product recycling program. Starbucks has shared hands in many community activities. The world's largest Internet search provider, Google, treats its employees as "gold." In addition to guaranteeing the quality of life of employees, protecting the environment, and developing products that benefit both consumers and the environment, companies also set up funds and donate to charity to contribute to the development of the society and community. Oil group Royal Dutch Shell established charity foundations, including the Early Learning Centre in South Africa to educate children and teach skills for adults. The World Bank (WB) and pharmaceutical company Merck launched an initiative to develop a $50 million foundation that includes donating Mectizan products to help 28 African countries cure diseases. Billionaires like Bill Gates and Warren Buffett and their companies' foundations contribute significantly to the eradication of disease through their donations.

In developed countries, social responsibility expenses used for research and development are more than those for charity purposes although philanthropic money is not insignificant. In conclusion, corporate social responsibility is playing an increasingly important role in fostering sustainable practices and economic development as well as the observance of laws and ethics throughout the world.

C13

     Two historians of the First World War both depict women as taking up roles previously reserved for men, but they differ slightly in the significance they ascribe to these unprecedented but temporary wartime duties. Gail Braybon describes the war as a liberating experience for many women. Although women working in munitions factories were subject to new dangers, such as explosions and trinitrotoluene poisoning, they were mindful of and proud of supporting the war effort, whether or not they considered the broader significance of their actions. Joshua Goldstein too describes a sense of freedom in women but emphasizes that it was short-lived. Although the war bent gender roles, it did not lessen hostility to women in traditionally male jobs, increase compensation for female labor, or uproot the notion that home life was a strictly female responsibility. Braybon might reply by noting that, while other changes were slower in coming, some women suffragists supported the war and women's role in it to further their cause, and this may indeed have contributed to the advent of women's right to vote after the war, even by Goldstein's account. Perhaps more central to Braybon's position is that the liberation that women experienced during the war was one of sentiment and therefore made no less real by the lack of accompanying widespread reform. Furthermore, even though the spirit of liberation must have faded with the end of the war, it might have lived on in a latent form and ultimately contributed to the formation of the women's movement.    

C13

     In 1905, the Supreme Court of the United States decided on the case Lochner v. New York, and in doing so overturned the Bakeshop Act, which limited the number of hours that a baker could work per day to ten. The Court ruled that the Act removed a person's right to enter freely into contracts, which it construed as provided for by the Fourteenth Amendment. The Court had previously determined through multiple rulings that the Due Process Clause, found in both the Fifth and Fourteenth Amendments, was not merely a procedural guarantee, but also a substantive limitation on the type of control the government may exercise over individuals. Lochner set a precedent against the established federal and state laws regulating working hours and wages. For example, in Adkins v. Children's Hospital, in 1923, the Court ruled that federal minimum wage legislation for women was an unconstitutional infringement of liberty of contract, as protected by due process.      Some subsequent development of human rights evolved on the basis of Lochner; for example, Adkins was a significant point in the women's rights movement in the U.S., as the legislature and justice department for decades debated whether to establish absolute equality of women or provide only special protections and regulations for them. Nevertheless, the Court overturned Adkins and undermined Lochner in deciding West Coast Hotel v. Parrish, in 1937. That ruling repudiated the idea that freedom of contract should be unrestricted and echoed, after the fact, the dissenting opinion of Justice Holmes in Adkins that there were plenty of constraints on contract, such as that against usury. At the time of West Coast Hotel, whose outcome hinged on an unexpected shift in the habits of Associate Justice Roberts, the dissenting Justice Sutherland was critical of the prospect that the interpretation of the Constitution reflected in the decision had been colored by contemporary events—ostensibly, the pressures placed upon workers by the circumstances of the ongoing Great Depression. Time has evidently judged this criticism to have been incorrect, since, while Lochner influenced a ruling whose imprint still remains, individual freedom of contract is not exempt from reasonable laws to protect worker health and safety.    

C13

     For an online retailer, inventory represents a major source of cost. Every item of inventory represents an item that has not been sold and which therefore represents unrealized gains. Moreover, the greater the inventory a retailer must hold the anticipation of filling customer orders, the greater the amount of money it must have invested in something that cannot be used for other purposes. Two tenets of inventory management are to turn over inventory as quickly as possible and to hold the minimum amount of inventory necessary to fulfill tomorrow's orders efficiently. Those two challenges are related. If lower levels of inventory are needed, then less inventory will be on hand and it will be turned over more quickly. In competing with another online retailer, however, a company will be inclined to hold inventory of as many items as exist. If a particular type of item is not in stock at one retailer, a customer will turn to a competing retailer. Holding all of the possible stock items in stock adds to inventory cost. A solution to this issue has been previously for a company to have one central, monster-sized warehouse. Centralizing inventory allows a company to hold the widest possible range of items at the lowest necessary levels. But since customers also value speed of delivery time, the "monster warehouse model" has a flaw in that it involves shipping from a location which may not be as close to a customer's location as otherwise and which therefore would be vulnerable to a competitor who can deliver faster.      These considerations highlight the importance of information about consumer demand. At the basic level, knowing what items sell helps brick-and-mortar retailers determine what items to stock. In competitive online retail, companies with good data can stock minimum sufficient inventory levels. Even more significant, a national retailer that can forecast demand for specific items by region can move from the monster warehouse model to a system of regional warehouses, decreasing shipping time without increasing inventory costs.    

C13

     The outsourcing of production factories to locations overseas from companies' home countries has been a hallmark practice of multinational brands since the 1990s and is lauded by some economists as advancing the well-being of people in both the home country and the production country. However, not all of the benefits attributed to this globalization practice necessarily accrue, and there are concerns about outsourcing that are not readily addressed within the formulations of economic theory. First, a home company that separates its brand and its product as completely as possible and places the brand as paramount hardly sends a message that product quality is central to its operations; more likely, all of its innovation attempts will focus on branding, and such a company will settle with a product that is merely (and maybe barely) good enough. Dismissing this point, economists may cite the law of comparative advantage: outsourcing allows both companies involved to pursue greater profit and well-being according to their capabilities. Specifically, workers in the companies of manufacture should be paid more than they would be paid otherwise, even if they are paid less than factory workers in the original country; meanwhile, workers in the home country should be pushed to increase their skills and education and move to higher-skill jobs that are less available in the country of manufacture. Whether displaced workers in the home country acquire skills and make this shift in any reasonable timeframe is hardly demonstrated, however, and while outsourcing may create value by lowering costs, it has been asserted that workers in the countries of production are making no more after outsourcing than previously and hence in effect are enjoying none of the new profit. The CEO of one outsourcing company, when pressed on this point by a reporter, explained that, as the employees of those factories were not employees of his company, he could not be responsible for them. He asked the reporter whether journalists should be expected to know, and be responsible for, the manufacturing conditions of the paper on which their articles are printed. This comment, as much as it defends corporations, highlights the broadest form of worry about outsourcing: in global supply chains with increasingly distant and opaque connections, responsibility is too easy to shirk and maybe even impossible to determine.  

C13

     Yawning is a reflex consisting of the simultaneous intake of air and reflexive stretching of the eardrums, followed by an exhalation of breath. There are two leading theories of the purpose of yawning, both in humans and other animals. Because yawning is common to most vertebrates, biologists assume that it plays an important role in survival. Two competing theories, dubbed “A” and “B,” seek to explain how.      Supporters of theory A argue that the primary purpose of yawning is to keep the brain cool. The human brain is quite sensitive to even small temperature increases: our reaction times increase and our recall is diminished when the temperature of the brain differs a few tenths of a degree from the perfect temperature of 98.6° F. The proponents of theory A point out that, in terms of escaping from a predator, these tiny temperature changes in the brain could easily be the difference between life and death.      However, critics of theory A argue that yawning is not more common in warmer climates, and that the body has much more sophisticated methods of maintaining the optimal temperature in the brain—the circulatory system, for one example, and sweating, for another. They advocate theory B, which claims that yawning plays a primarily social role based on the fact that yawning is “contagious.”      Because yawning is so demonstrative and affects the body so little, say supporters of theory B, the reflex is most likely a social mode of communication that happens to have some slight physiological effects. The contagiousness of yawning has been shown to be stronger among group members who feel closer to each other, implying that it has a major social component. Based on this information, theory B claims that the primary purpose of yawning is to communicate an increased need for alertness throughout a group. This alertness, according to theory B, is only slightly encouraged by the yawning itself; the real benefit of the contagious yawn is that the yawning animal is reminded to stay alert to the other members of the group and to the surroundings.

C13

When Medgar Evers applied to the then-segregated University of Mississippi Law School in February 1954, he did so at a crucial moment in American history. Three months later, in May, the Supreme Court’s landmark decision in Brown v. Board of Education struck down state-sponsored segregation, stating that "separate educational facilities are inherently unequal." The school’s refusal to admit Evers drew the interest of the NAACP and ultimately became the epicenter of its historic campaign to desegregate the school.

The Brown v. Board of Education ruling paved the way for integration and was a major victory for the civil rights movement, but the South was not ready to accept the change. The state governments of Texas, Arkansas, Florida and Alabama actively fought the decision, with some politicians physically blocking African American students’ entry into high schools and universities, moving aside only when confronted with military officers sent by the federal government to enforce the law. The entrenched racism of the South came into conflict with the rest of the country, creating a sense for African Americans that they would have to fight for the rights that had, legally, already been granted to them.

Evers was an active public figure, conducting well-publicized investigations into race-based injustices being perpetrated in the South, such as the unprosecuted murder of fourteen-year-old Emmett Till. This limelight brought numerous death threats and attempts on his life. On June 12, 1963, just hours after President John F. Kennedy's historic Civil Rights Address, Evers was shot in the back outside his home by a white supremacist. While his death was undoubtedly a tragic loss, some scholars have suggested that it galvanized the African American community, giving many members renewed motivation to carry on Evers’s crusade. His murder was a rallying cry for those who supported civil rights in the U.S., and his legacy continues to lend strength to the ongoing campaign for racial equality.

C13      The Smithian model of innate human disposition—as entirely self-interested, gleaning motivation only from personal profit—has long underpinned modern economic theory. One proponent of the person-as-selfish-agent model is Samantha T. Cleary, an economist who argues that this view of human nature remains the most useful basis for advancing behavioral economics and opposes more complex algorithms that take into account such complicating factors as altruism and social pressure. Economics is a purely statistical field of study concerned with a society's most common motivators, not every individual's. The field can operate most efficiently by using straightforward models that Cleary poetically describes as elegant.
     Yet how will economics strengthen its predictive powers if not by increasing the sophistication of its models, using swaths of data to inform analysis of the many processes that drive the aggregation of human economic decisions? How can behavioral economics develop without this step? If a behavior follows a any consistent pattern across a large cross section of the population, economists should be able to measure and predict it, at least theoretically. But even if an algorithm could account for complex motivations and apparently irrational decisions, Cleary argues that such an approach to studying economic behavior would remain greatly vulnerable to misinterpretation, bias, and hyperlocal preferences. Furthermore, this complex algorithm would only introduce a greater margin of error, while being so complex and situation-specific as to be useless for rendering any long-term or generalizable predictions. It might have the capacity to describe the behaviors of a small pocket of people, but couldn't contribute to broader economic theory in any meaningful way.
     Imagine, though, that an intricate algorithm were able to accurately predict behaviors based on many more inputs than self-interest. Whether the prediction confirmed or denied established economic theory, it would still contribute to the growing body of data in behavioral economics. People, unlike machines, do not operate according to simple psychological rules, and if we can account for this to some extent in our work, it is hard to envision a reason why we would not accept the challenge of doing so. Economies, after all, depend ultimately on one thing: human decision-making. Work based on the assumption that personal choices obey centuries-old economic theories is willfully limited in scope. To be aligned with the arguments of purists like Cleary, one would have to dismiss the ultimate purpose of economic study: to understand and predict the workings of real economies.
C13

     A new discovery adds another element to the complex relationship between humans and felines in the prehistoric Americas. Archaeologists recently realized that a skeleton discovered at the Illinois Hopewell Burial Mounds had been misidentified as a dog. The bones actually belonged to a bobcat, probably between four and seven months old when it perished almost two thousand years ago. The bobcat burial was striking in its similarity to human interments, and is possibly the first decorated wildcat burial ever discovered.

     In considering the implications of this discovery, the researchers dismissed the possibility that the bobcat had been sacrificed, because the skeleton did not show signs of any trauma. They decided it was not an intrusive burial because it so closely mirrored the style of Hopewell human burials. They also do not believe the cat was venerated as a wild predator, because its grave did not contain the ceremonial adornments present in coyote burial sites. The conclusion the researchers have drawn is that the bobcat had a much closer relationship to the humans who buried it—that is to say, it may have been domesticated, occupying a place within the residential sphere. Such a conclusion, according to the researchers, is further supported by two Hopewellian artifacts, an effigy pipe and a ceramic figurine, adorned with human-bobcat imagery.

C13

     Everest and Jengish Chokusu, two of the tallest mountains on earth, are both products of collisions between continental plates and other tectonic forces. Ojos del Salado and Llullaillaco are somewhat shorter and the product of volcanic forces. The formation of these mountains can be compared to that of the planets in our solar system, in which the original stellar material congealed to form multiple celestial bodies with wildly varying sizes, compositions, and physical characteristics. The mountains of Earth are, however, more identifiable than the materials from which they originally formed: mountains are formed from the same rocks and minerals that have existed on Earth for billions of years. Everest, for example, is largely composed of limestone and marble, Jengish Chokusu consists primarily of crystalline and sedimentary rocks, and though Ojos del Salado and Llullaillaco are both different types of volcanic peak, both have similar metamorphic compositions.

     The distinction between volcanic and tectonically formed peaks has behavioral ramifications. Ojos de Salado remains an active volcano, and Llullaillaco is dormant at present but has been active in the past. Everest and Jengish Chokusu were formed from a tectonic plate collision millions of years ago, so they exhibit no volcanic activity. Because of that, the appearances of Everest and Jengish Chokusu are permanent, more or less; tectonic changes occur more slowly than volcanic changes and those two mountains will change but very gradually. On the other hand, the appearances of Ojos del Salado and Llullaillaco might change rapidly and with little warning, as dormant volcanoes have been known to become active and volcanic eruptions can radically reshape mountains in a matter of moments.

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