Quartz 4

题目

25 min read

Part 1: Optimal Decisions Are Made at the Margin (最优决策是在边际上做出的)

1. What is the key principle of making optimal decisions at the margin? (做出最优决策的关键原则是什么？)

📖 点击查看答案 To make optimal decisions, one compares the marginal benefit (MB) and marginal cost (MC) of an additional unit of activity. (做出最优决策需要比较每增加一单位活动的边际收益（MB）和边际成本（MC）。)

2. What is marginal benefit? (什么是边际收益？)

📖 点击查看答案 Marginal benefit is the additional benefit gained from consuming or producing one more unit of a good or service. (边际收益是指消费或生产额外一个单位商品或服务所获得的额外收益。)

3. What is marginal cost? (什么是边际成本？)

📖 点击查看答案 Marginal cost is the additional cost incurred from consuming or producing one more unit of a good or service. (边际成本是指消费或生产额外一个单位商品或服务所增加的成本。)

4. How do economists use marginal analysis in decision-making? (经济学家如何在决策中使用边际分析？)

📖 点击查看答案 Economists use marginal analysis to compare the additional benefits and additional costs of a decision and determine whether continuing the activity is worthwhile. (经济学家使用边际分析来比较决策的额外收益和额外成本，以判断是否值得继续该活动。)

5. What is an example of applying marginal analysis in daily life? (在日常生活中应用边际分析的例子是什么？)

📖 点击查看答案 Deciding whether to watch another hour of TV or study involves comparing the marginal benefit (enjoyment from TV) and the marginal cost (potential lower test score). (决定是否再看一小时电视还是学习，涉及比较边际收益（观看电视的乐趣）和边际成本（可能降低的考试分数）。)

Part 2: Opportunity Cost (机会成本)

6. What is opportunity cost? (什么是机会成本？)

📖 点击查看答案 Opportunity cost is the value of the highest-valued alternative that must be given up in order to engage in an activity. (机会成本是指为了从事某项活动而必须放弃的最高价值的替代方案的价值。)

7. How does opportunity cost relate to scarcity? (机会成本如何与稀缺性相关？)

📖 点击查看答案 Because resources are scarce, choosing one option means giving up another. Opportunity cost measures the value of the forgone option. (由于资源是稀缺的，选择一个选项意味着放弃另一个选项。机会成本衡量的是被放弃选项的价值。)

8. Why does opportunity cost include only the best alternative and not all alternatives? (为什么机会成本只包括最佳替代方案，而不是所有替代方案？)

📖 点击查看答案 Opportunity cost considers only the most valuable alternative because that is the real cost of making a decision. Including all alternatives would make the concept impractical. (机会成本只考虑最有价值的替代方案，因为那才是决策的真正成本。包括所有替代方案会使这个概念变得不切实际。)

9. What is an example of opportunity cost in education? (教育中的机会成本的例子是什么？)

📖 点击查看答案 The opportunity cost of attending college includes the income one could have earned by working during those years and the tuition fees paid. (上大学的机会成本包括在那些年里可以通过工作赚取的收入，以及支付的学费。)

10. How does opportunity cost apply to business decisions? (机会成本如何适用于商业决策？)

📖 点击查看答案 If a company invests in producing a new product, the opportunity cost is the profit it could have earned from an alternative investment. (如果一家公司投资生产一种新产品，那么机会成本就是它本可以从另一种投资中获得的利润。)

Part 3: Marginal Analysis in Real-Life Decisions (现实生活中的边际分析)

11. What is the rule for making optimal decisions in marginal analysis? (边际分析中做出最优决策的规则是什么？)

📖 点击查看答案 The optimal decision is to continue an activity until marginal benefit (MB) equals marginal cost (MC). 最优决策是持续进行某项活动，直到边际收益（MB）等于边际成本（MC）。

12. How does a business use marginal analysis when deciding production levels? (企业在决定生产水平时如何使用边际分析？)

📖 点击查看答案 A business produces additional units as long as the marginal benefit (revenue) exceeds or equals the marginal cost of production. 企业在边际收益（收入）超过或等于边际成本时，才会继续增加生产单位。

13. In the example of Apple producing more iPhones, what are the marginal benefit and marginal cost? (在苹果公司生产更多 iPhone 的例子中，边际收益和边际成本是什么？)

📖 点击查看答案 The marginal benefit is the additional revenue from selling more iPhones, while the marginal cost includes wages, parts, and other production costs. 边际收益是销售更多 iPhone 所获得的额外收入，而边际成本包括工资、零件和其他生产成本。

14. Why do firms stop production when marginal cost exceeds marginal benefit? (为什么当边际成本超过边际收益时，企业会停止生产？)

📖 点击查看答案 Because producing beyond this point results in a net loss, making the production inefficient. 因为超过这一点的生产会导致净损失，使生产变得低效。

15. How does marginal analysis apply to studying for an exam? (边际分析如何适用于备考？)

📖 点击查看答案 The marginal benefit of extra study time is a potential grade improvement, while the marginal cost is the time lost for other activities. 额外学习时间的边际收益是可能提高的考试成绩，而边际成本是失去进行其他活动的时间。

Part 4: Opportunity Cost in Everyday Life (日常生活中的机会成本)

16. What is the opportunity cost of working overtime? (加班的机会成本是什么？)

📖 点击查看答案 The opportunity cost is the leisure time or personal activities one gives up to work extra hours. 机会成本是为工作额外的时间而放弃的休闲时间或个人活动。

17. How does opportunity cost affect government spending? (机会成本如何影响政府支出？)

📖 点击查看答案 If the government allocates funds to space exploration, the opportunity cost may be reduced funding for healthcare or education. 如果政府将资金用于太空探索，机会成本可能是减少医疗或教育的资金。

18. What is an example of opportunity cost in transportation choices? (交通选择中的机会成本的一个例子是什么？)

📖 点击查看答案 Taking a train instead of driving may save money, but the opportunity cost could be extra travel time. 选择乘坐火车而不是开车可能会节省金钱，但机会成本可能是额外的旅行时间。

19. How does the opportunity cost of going to college affect decision-making? (上大学的机会成本如何影响决策？)

📖 点击查看答案 Students must weigh the cost of tuition and lost earnings against the future benefits of higher education. 学生必须权衡学费和失去的收入，与高等教育带来的未来收益之间的关系。

20. What role does opportunity cost play in environmental regulations? (机会成本在环境法规中扮演什么角色？)

📖 点击查看答案 If factories reduce pollution, the opportunity cost is the money spent on environmental technology instead of business expansion. 如果工厂减少污染，机会成本是用于环境技术的资金，而不是用于业务扩展的资金。

Part 5: Trade-Offs and Decision-Making (权衡与决策)

21. What is a trade-off in economics? (经济学中的权衡是什么？)

📖 点击查看答案 A trade-off is the idea that because of scarcity, producing more of one good or service means producing less of another. 权衡是指由于资源有限，生产更多某种商品或服务意味着减少生产另一种商品或服务。

22. How does scarcity lead to trade-offs? (稀缺性如何导致权衡？)

📖 点击查看答案 Since resources are limited, individuals and societies must make choices on how to allocate them effectively. 由于资源有限，个人和社会必须做出选择，以有效地分配资源。

23. What is the relationship between trade-offs and opportunity cost? (权衡与机会成本之间的关系是什么？)

📖 点击查看答案 Trade-offs occur due to scarcity, and opportunity cost is the value of the best alternative forgone in those trade-offs. 权衡因稀缺性而发生，而机会成本是这些权衡中被放弃的最佳选择的价值。

24. How do individuals face trade-offs in their daily lives? (个人在日常生活中如何面临权衡？)

📖 点击查看答案 People must decide how to spend time, money, and resources—for example, choosing between work and leisure. 人们必须决定如何分配时间、金钱和资源，例如在工作和休闲之间做选择。

25. How do governments face trade-offs when making policies? (政府在制定政策时如何面临权衡？)

📖 点击查看答案 If a government increases spending on military defense, it may have to reduce investment in education or healthcare. 如果政府增加国防开支，可能需要减少对教育或医疗的投资。

Part 6: Production and Resource Allocation (生产与资源分配)

26. What are the three fundamental economic questions? (经济学的三个基本问题是什么？)

📖 点击查看答案 1. What goods and services will be produced? 1. How will the goods and services be produced? 2. Who will receive the goods and services produced?
  1. 生产哪些商品和服务？
  2. 如何生产这些商品和服务？
  3. 谁将获得这些商品和服务？

27. Why must every society answer these three economic questions? (为什么每个社会都必须回答这三个经济问题？)

📖 点击查看答案 Because resources are scarce, societies must decide how to allocate them efficiently. 由于资源稀缺，社会必须决定如何有效分配这些资源。

28. How does a market economy answer these three questions? (市场经济如何回答这三个问题？)

📖 点击查看答案 Through supply and demand—producers decide what to produce based on consumer preferences. 通过供需关系——生产者根据消费者的偏好决定生产什么。

29. How does a command economy answer these three questions? (计划经济如何回答这三个问题？)

📖 点击查看答案 The government makes all economic decisions about production and distribution. 政府决定所有关于生产和分配的经济决策。

30. What is the role of opportunity cost in production decisions? (机会成本在生产决策中扮演什么角色？)

📖 点击查看答案 Firms must decide which goods to produce by comparing the benefits of different production options. 企业必须通过比较不同生产选项的收益来决定生产哪些商品。

Part 7: Marginal Analysis in Business and Policy (企业与政策中的边际分析)

31. Why is marginal cost important for businesses? (边际成本对企业为什么重要？)

📖 点击查看答案 It helps businesses determine the profitability of producing additional units. 它帮助企业确定生产额外单位的盈利能力。

32. What happens when marginal cost exceeds marginal benefit? (当边际成本超过边际收益时会发生什么？)

📖 点击查看答案 It is no longer profitable to continue the activity, so production should stop or be reduced. 继续进行该活动将不再盈利，因此应停止或减少生产。

33. How can governments use marginal analysis in environmental policies? (政府如何在环境政策中使用边际分析？)

📖 点击查看答案 They compare the costs of pollution control with the benefits of improved public health and environment. 他们比较污染控制的成本与改善公共健康和环境的收益。

34. Why do companies use marginal analysis in pricing strategies? (公司为什么在定价策略中使用边际分析？)

📖 点击查看答案 To set prices where the marginal revenue from selling an extra unit equals the marginal cost. 为了设定价格，使销售额外单位的边际收益等于边际成本。

35. How does marginal analysis affect labor decisions? (边际分析如何影响劳动力决策？)

📖 点击查看答案 Firms hire additional workers if their marginal benefit (output) exceeds their marginal cost (wages). 如果工人的边际收益（产出）超过边际成本（工资），企业就会雇佣更多工人。

Part 8: Economic Systems and Market Structures (经济体系与市场结构)

36. What are the main types of economic systems? (主要的经济体系有哪些？)

📖 点击查看答案 1. Market economy (市场经济) 1. Command economy (计划经济) 2. Mixed economy (混合经济) 3. Traditional economy (传统经济)

37. How does a mixed economy work? (混合经济是如何运作的？)

📖 点击查看答案 It combines elements of both market and command economies, with some government intervention. 它结合了市场经济和计划经济的特点，并包含一定的政府干预。

38. What are the key features of a market economy? (市场经济的关键特征是什么？)

📖 点击查看答案 Private ownership, supply and demand determine prices, minimal government interference. 私有制、供需决定价格、政府干预较少。

39. What are the disadvantages of a command economy? (计划经济的缺点是什么？)

📖 点击查看答案 Inefficiency, lack of innovation, limited consumer choice. 效率低下、缺乏创新、消费者选择有限。

40. What role does competition play in a market economy? (竞争在市场经济中扮演什么角色？)

📖 点击查看答案 Competition encourages efficiency, innovation, and lower prices for consumers. 竞争促进效率、创新，并降低消费者价格。

Part 9: Government Intervention and Economic Policies (政府干预与经济政策)

41. Why do governments impose taxes? (政府为什么征税？)

📖 点击查看答案 To generate revenue, redistribute income, and influence economic behavior. 为了增加财政收入、重新分配财富，并影响经济行为。

42. What are price ceilings and price floors? (价格上限和价格下限是什么？)

📖 点击查看答案 Price ceiling: A legal maximum price (e.g., rent control). Price floor: A legal minimum price (e.g., minimum wage).

价格上限：法律规定的最高价格（如房租控制）。
价格下限：法律规定的最低价格（如最低工资）。

43. How does a subsidy affect market equilibrium? (补贴如何影响市场均衡？)

📖 点击查看答案 Subsidies lower production costs, increasing supply and lowering prices. 补贴降低生产成本，提高供应量，降低价格。

44. What is a public good? (什么是公共物品？)

📖 点击查看答案 A good that is non-excludable and non-rivalrous, such as national defense. 一种不可排他且不可竞争的商品，如国防。

45. Why do monopolies require government regulation? (为什么垄断需要政府监管？)

📖 点击查看答案 To prevent unfair pricing, encourage competition, and protect consumers. 防止不公平定价，促进竞争，保护消费者。

Part 10: Personal Finance and Economic Decision-Making (个人理财与经济决策)

46. What is the opportunity cost of saving money? (存钱的机会成本是什么？)

📖 点击查看答案 Foregoing immediate consumption or investment in other assets. 放弃即时消费或投资于其他资产。

47. Why is budgeting important in personal finance? (预算管理在个人理财中为何重要？)

📖 点击查看答案 It helps allocate resources efficiently and prevents overspending. 有助于高效分配资源，并防止超支。

48. How does inflation affect purchasing power? (通货膨胀如何影响购买力？)

📖 点击查看答案 Inflation reduces the value of money, decreasing purchasing power over time. 通货膨胀降低货币价值，导致购买力随时间下降。

49. What is compound interest? (什么是复利？)

📖 点击查看答案 Interest calculated on both the initial principal and accumulated interest. 基于初始本金和已累积利息计算的利息。

50. How does credit card debt impact financial health? (信用卡债务如何影响财务健康？)

📖 点击查看答案 High-interest debt can accumulate quickly, leading to financial strain. 高利息债务可能迅速累积，造成财务压力。

Part 11: International Trade and Global Economy (国际贸易与全球经济)

51. What is absolute advantage? (什么是绝对优势？)

📖 点击查看答案 Absolute advantage occurs when a country can produce a good more efficiently than another country. 绝对优势指的是一个国家能比另一个国家更高效地生产某种商品。

52. What is comparative advantage? (什么是比较优势？)

📖 点击查看答案 Comparative advantage occurs when a country can produce a good at a lower opportunity cost than another country. 比较优势指的是一个国家能以更低的机会成本生产某种商品。

53. How do tariffs impact international trade? (关税如何影响国际贸易？)

📖 点击查看答案 Tariffs increase the cost of imported goods, reducing imports and protecting domestic industries. 关税提高进口商品的成本，减少进口，并保护本国工业。

54. What is the role of exchange rates in global trade? (汇率在全球贸易中的作用是什么？)

📖 点击查看答案 Exchange rates determine the relative price of currencies, affecting trade competitiveness. 汇率决定货币的相对价格，影响贸易竞争力。

55. What is the World Trade Organization (WTO)? (什么是世界贸易组织（WTO）？)

📖 点击查看答案 The WTO is an international organization that regulates global trade and resolves trade disputes. 世界贸易组织是一个监管全球贸易并解决贸易争端的国际组织。

Part 12: Supply, Demand, and Market Equilibrium (供需与市场均衡)

56. What is the law of demand? (需求法则是什么？)

📖 点击查看答案 The law of demand states that, all else equal, as price decreases, quantity demanded increases. 需求法则表明，在其他条件不变的情况下，价格下降时，需求量增加。

57. What factors shift the demand curve? (哪些因素会导致需求曲线移动？)

📖 点击查看答案 Income, preferences, prices of related goods, future expectations, and population changes. 收入、偏好、相关商品价格、未来预期和人口变化。

58. What is the law of supply? (供给法则是什么？)

📖 点击查看答案 The law of supply states that, all else equal, as price increases, quantity supplied increases. 供给法则表明，在其他条件不变的情况下，价格上升时，供给量增加。

59. What factors shift the supply curve? (哪些因素会导致供给曲线移动？)

📖 点击查看答案 Production costs, technology, government policies, number of sellers, and future expectations. 生产成本、技术、政府政策、卖方数量和未来预期。

60. What happens when there is a surplus in a market? (市场出现剩余时会发生什么？)

📖 点击查看答案 Prices tend to decrease as suppliers try to sell excess inventory. 由于供应商试图销售多余库存，价格通常会下降。

Part 13: Market Failures and Externalities (市场失灵与外部性)

61. What is a negative externality? (什么是负外部性？)

📖 点击查看答案 A cost imposed on a third party, such as pollution. 对第三方造成的成本，例如污染。

62. What is a positive externality? (什么是正外部性？)

📖 点击查看答案 A benefit received by a third party, such as education. 第三方获得的收益，例如教育。

63. How do governments address externalities? (政府如何解决外部性问题？)

📖 点击查看答案 Through taxes, subsidies, and regulations. 通过税收、补贴和法规。

64. What is the tragedy of the commons? (什么是公地悲剧？)

📖 点击查看答案 The overuse of a shared resource due to individual self-interest. 由于个体的自利导致对公共资源的过度使用。

65. How can property rights help prevent market failure? (产权如何帮助防止市场失灵？)

📖 点击查看答案 By giving individuals incentives to manage resources efficiently. 通过给予个人管理资源的激励。

Part 14: Macroeconomic Indicators and Growth (宏观经济指标与增长)

66. What is GDP? (什么是GDP？)

📖 点击查看答案 Gross Domestic Product measures the total value of goods and services produced in a country. 国内生产总值衡量一个国家生产的所有商品和服务的总价值。

67. What are the main components of GDP? (GDP的主要组成部分是什么？)

📖 点击查看答案 Consumption, investment, government spending, and net exports. 消费、投资、政府支出和净出口。

68. How is unemployment measured? (失业率如何衡量？)

📖 点击查看答案 As the percentage of the labor force that is actively seeking work but unable to find it. 作为正在积极寻找工作但无法找到工作的劳动力比例。

69. What is inflation? (什么是通货膨胀？)

📖 点击查看答案 A sustained increase in the general price level of goods and services. 商品和服务的一般价格水平持续上升。

70. What is the business cycle? (什么是经济周期？)

📖 点击查看答案 The fluctuations in economic activity over time, including expansion and recession. 随时间变化的经济活动波动，包括扩张和衰退。

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