📚 Year 7 Cambridge Economics: Interdisciplinary Integrated Question Practice | 剑桥Year 7经济：跨学科综合题型训练
This article brings together economics with history, geography, maths and even a little science. Each section presents a question that stretches your ability to think across subjects, just like real-world economists do every day. By practising these integrated tasks, you will deepen your understanding of core Year 7 Cambridge Economics topics such as scarcity, choice, opportunity cost, money, supply and demand, and economic systems.
本文把经济学与历史、地理、数学甚至一点科学结合在一起。每一节都给出一个问题，锻炼你跨学科思考的能力，就像现实世界中的经济学家每天所做的那样。通过练习这些综合性题目，你将加深对剑桥Year 7经济学核心主题的理解，比如稀缺性、选择、机会成本、货币、供求关系以及经济体系。
1. The Problem of Scarcity: A Historical Case Study | 稀缺性问题：历史案例研究
Scarcity means that people have unlimited wants but only limited resources. Understanding how ancient civilisations handled scarcity lets you see economics through a historian’s eyes. Read the passage about the Nile floods and answer the questions.
稀缺性意味着人们有无限的需求，但资源却有限。了解古代文明如何应对稀缺，能让你以历史学家的视角看待经济学。阅读下面关于尼罗河洪水的短文并回答问题。
In Ancient Egypt, the Nile River flooded every year, depositing fertile silt on the farmland. In years of good flooding, the harvest was plentiful. In years of low flooding, food became scarce. Egyptian farmers had to choose carefully how much grain to store for the next year and how much to trade for tools and pottery. The Pharaoh’s government collected part of the harvest as tax, which was stored in large granaries and redistributed during famines.
在古埃及，尼罗河每年都会泛滥，把肥沃的淤泥留在农田里。在洪水充沛的年份，收成很好；在洪水少的年份，粮食变得稀缺。埃及农民必须谨慎选择储存多少谷物供来年使用，以及用多少去换取工具和陶器。法老的政府征收一部分收成作为税收，这些粮食储存在巨大的粮仓中，在饥荒时重新分配。
Question 1A (History + Economics): Identify the limited resources and the unlimited wants in this story. Explain how the government’s granary system helped cope with scarcity.
问题 1A（历史+经济）： 找出这个故事中的有限资源和无限需求。解释政府的粮仓系统如何帮助应对稀缺性。
Question 1B (Geography + Economics): Draw a simple map of the Nile valley. Mark the farmland near the river and the desert beyond. Explain why the fertile land was a scarce resource and how this shaped Egyptian settlement patterns.
问题 1B（地理+经济）： 画一幅尼罗河谷的简图，标出河边的农田和远处的沙漠。解释为什么肥沃的土地是一种稀缺资源，以及它如何塑造了埃及的定居模式。
Model Answer Approach: The limited resources were the fertile land, the annual floodwater and the grain harvest itself. Unlimited wants included the farmers’ desire for more food, more trade goods and the government’s need to feed the entire population. The granary system acted as a buffer: storing surplus in good years made food available in bad years, reducing the impact of scarcity.
参考答案思路： 有限资源是肥沃的土地、每年的洪水和粮食收成本身。无限需求包括农民想要更多的食物、更多的贸易品，以及政府需要养活全人口。粮仓系统起到了缓冲作用：在好年景储存余粮，在坏年景提供粮食，从而减轻了稀缺性的影响。
2. Opportunity Cost and Mathematics: Calculating Your Best Choice | 机会成本与数学：计算最佳选择
Opportunity cost is the next best alternative you give up when you make a choice. It can often be calculated using simple arithmetic. Try this problem that mixes economics with maths.
机会成本是当你做出选择时所放弃的次优替代选项。它通常可以用简单的算术计算。试试这道融合了经济学与数学的题目。
Imagine you have £10 of pocket money for the week. You can spend it on a cinema ticket (£7) or a second-hand book (£6) and still have change, or you can save it all. Your three favourite options are:
假设你每周有10英镑零用钱。你可以花7英镑买一张电影票，或花6英镑买一本二手书（还有找零），或者把钱都存起来。你最喜欢的三个选项是：
A: Go to the cinema (£7) and keep the remaining £3.
B: Buy the book (£6) and keep £4, then also borrow a free e-book from the library.
C: Save the full £10 and earn £0.10 interest from the bank.
A：去看电影（7英镑）并保留剩下的3英镑。
B：买书（6英镑）并保留4英镑，然后从图书馆免费借一本电子书。
C：存下全额10英镑，从银行获得0.10英镑利息。
Question 2A: If you choose option A, what is the opportunity cost? (Hint: compare the value of the next best option you did not pick.)
问题 2A： 如果你选择了选项A，机会成本是什么？（提示：比较你没有选择的次优选项的价值。）
Question 2B (Maths link): Calculate the total gain in satisfaction if you pick B instead of A. Assign ‘satisfaction points’ as follows: cinema = 9 points, book = 8 points, extra cash per £1 = 1 point, free e‑book = 3 points, and £0.10 interest = 0.1 point. Use operation: (B points) − (A points) to find the difference.
问题 2B（数学关联）： 如果你选择B而不是A，计算满意度总收益。分配“满意度分数”如下：电影=9分，书=8分，每多保留1英镑现金=1分，免费电子书=3分，0.10英镑利息=0.1分。用计算式：(B分数) − (A分数) 找出差值。
Let us compute Option A: Cinema (9 points) + remaining cash £3 (3 points) = 12 points. Option B: Book (8 points) + remaining cash £4 (4 points) + free e‑book (3 points) = 15 points. So B gives 3 points more than A. The opportunity cost of choosing A is the satisfaction you could have got from B, which is worth 15 points. When you replace the numbers, you are doing cross‑disciplinary work.
我们来计算：选项A：电影（9分）+ 剩余现金3英镑（3分）= 12分。选项B：书（8分）+ 剩余现金4英镑（4分）+ 免费电子书（3分）= 15分。所以B比A多3分。选择A的机会成本是本来可以从B获得的满意度，价值15分。当你代入数字时，你就在进行跨学科作业。
3. From Barter to Banknotes: The Evolution of Money | 从物物交换到纸币：货币的演变
Before money existed, people used barter—trading goods directly. But barter had a big problem: the need for a double coincidence of wants. This topic links economics with history and archaeology.
在货币出现之前，人们使用物物交换——直接交换商品。但物物交换有一个大问题：需要“需求的双重巧合”。这个主题把经济学与历史和考古学联系起来。
Imagine you are a potter in Mesopotamia around 3000 BCE. You want some barley, but the farmer does not need any more pots. You must find something the farmer wants. This is time‑consuming and inefficient. The invention of commodity money (like silver pieces or barley receipts) and later coinage solved this problem. Clay tablets from ancient cities record these early transactions.
想象你是公元前3000年左右美索不达米亚的一名陶匠。你想要一些大麦，但农夫不再需要陶罐。你必须找到农夫想要的东西。这既费时又低效。商品货币（如银块或大麦收据）以及后来铸币的发明解决了这个问题。古代城市的泥板记录了这些早期交易。
Question 3A (History → Economics): Explain why a silver ring used as money must be divisible, durable and portable. Use examples from Mesopotamian trade to support your answer.
问题 3A（历史→经济）： 解释为什么用作货币的银环必须具备可分性、耐久性和便携性。用美索不达米亚贸易的例子支持你的答案。
Question 3B (Creative + Economics): Design your own commodity money for an island society that has coconuts, shells and volcanic rock. Describe what you would choose and evaluate the three functions of money it must serve (medium of exchange, store of value, unit of account).
问题 3B（创意+经济）： 为一个拥有椰子、贝壳和火山岩的岛屿社会设计你自己的商品货币。描述你的选择，并评估它必须发挥的货币三大功能（交换媒介、价值贮藏、计价单位）。
An artefact‑based approach: Archaeologists found clay envelopes with tokens inside that represented promised goods. This was a step towards abstract money. By studying surviving tablets, we can see how economic records emerged. Linking these discoveries to the concept of money makes history and economics work together seamlessly.
基于文物的方法：考古学家发现了内有代表承诺货物的代币的封泥信封。这是向抽象货币迈出的一步。通过研究幸存泥板，我们能看到经济记录是如何出现的。把这些发现与货币概念联系起来，能使历史与经济学无缝结合。
4. Budgeting with Bar Charts: Personal Finance Meets Data Handling | 用条形图做预算：个人理财与数据处理相结合
A budget helps you plan how to use your limited income. Creating a visual budget with a bar chart turns personal finance into a maths exercise. Study the scenario and answer the questions.
预算帮助你规划如何使用有限的收入。用条形图制作可视化预算可以把个人理财变成一道数学题。研究下列情境并回答问题。
You earn £20 per week from a paper round. Your weekly essential expenses are: lunch at school £8, mobile phone top‑up £5, and savings for a new bike £4. You want to spend the rest on sweets and magazines. Draw a bar chart where the horizontal axis shows categories (Lunch, Phone, Savings, Treats) and the vertical axis shows pounds. Use different colours for each bar.
你每周送报挣20英镑。每周必要支出为：学校午餐8英镑，手机充值5英镑，为买新自行车存4英镑。你想把剩下的钱花在糖果和杂志上。画一个条形图，横轴为类别（午餐、手机、储蓄、零食），纵轴为英镑。每个条用不同颜色。
Question 4A (Maths calculation): How much money remains for treats? Express this as a fraction of your total weekly income in its simplest form.
问题 4A（数学计算）： 剩下多少钱用于零食？将这笔金额表示为占每周总收入的最简分数。
Total spent on essentials = £8 + £5 + £4 = £17, so treats = £20 − £17 = £3. As a fraction of income: 3/20. This is already in simplest form.
必要支出总额 = 8 + 5 + 4 = 17英镑，所以零食 = 20 − 17 = 3英镑。占收入分数：3/20，已是最简形式。
Question 4B (Economics reasoning): Suppose your phone bill rises to £7. What is the opportunity cost of this increase if you still want to save £4 and buy lunch? Explain with reference to your bar chart and the new fraction for treats.
问题 4B（经济推理）： 假设你的电话费涨到7英镑。如果你仍然想存4英镑并买午餐，这项增长的机会成本是什么？参考你的条形图和零食的新分数来说明。
New spending: £8 lunch + £7 phone + £4 savings = £19, treats become £1. You must give up £2 worth of treats (falling from £3 to £1). The opportunity cost of the higher phone bill is the sweets, magazines or other enjoyment you lose. The new treat fraction is 1/20. The bar chart would show a much shorter treat bar.
新支出：午餐8 + 电话7 + 储蓄4 = 19英镑，零食变成1英镑。你必须放弃价值2英镑的零食（从3英镑降至1英镑）。更高电话费的机会成本是你失去的糖果、杂志或其他享乐。新的零食分数是1/20。条形图中零食条会短很多。
5. Demand and Supply in Different Locations: A Geographic Analysis | 不同地点的需求与供给：地理分析
The demand for a good and its supply can vary dramatically depending on location. By examining climate zones or population density, you can merge geography with economic reasoning. Let us consider ice cream in two contrasting places.
一种商品的需求和供给会因地点而大不相同。通过考察气候带或人口密度，你可以将地理与经济推理相结合。让我们考虑两种截然不同地方的冰淇淋。
Location X: A hot beach town in summer. Temperature 32 °C. Many tourists. Location Y: A cold mountain village in winter. Temperature -5 °C. Few visitors. Ice cream sellers must decide how much stock to bring and at what price to sell.
地点X：夏季炎热的海滩小镇，气温32 °C，游客众多。地点Y：冬季寒冷的山村，气温-5 °C，几乎没有游客。冰淇淋卖家必须决定带多少货以及以什么价格出售。
Question 5A: Draw a demand and supply diagram for ice cream in Location X. Explain what would happen to the equilibrium price if an extra ice cream van arrives. Use the term ‘supply shift’.
问题 5A： 画出地点X冰淇淋的需求和供给图。解释如果多来一辆冰淇淋车，均衡价格会怎样。使用术语“供给移动”。
Question 5B (Geography connection): In Location Y, a warm front raises the temperature to 5 °C for one week. Predict the change in demand. Is this a movement along the demand curve or a shift? Justify your answer using the idea of consumer preferences influenced by weather.
问题 5B（地理关联）： 在地点Y，一股暖锋使气温在一周内升至5 °C。预测需求的变化。这是沿着需求曲线的移动还是需求曲线的平移？用受天气影响的消费者偏好这一概念来证明你的答案。
In Location X, high demand and many suppliers might lead to a competitive price. An extra van increases supply, shifting the supply curve to the right and lowering the equilibrium price. In Location Y, a temperature rise increases the desire for ice cream, shifting the entire demand curve to the right—not just a movement along it, because the weather changes taste, not just price.
在地点X，高需求和多供应商可能导致竞争性价格。额外的冰淇淋车增加了供给，使供给曲线右移，均衡价格下降。在地点Y，气温上升增加了对冰淇淋的渴望，使整条需求曲线向右平移——而不仅仅是沿曲线移动，因为天气改变了口味，而不仅仅是价格。
6. Production Possibility Curve: Graphing Trade-offs | 生产可能性曲线：绘制权衡图
A production possibility curve (PPC) shows the maximum combinations of two goods an economy can produce with its resources. This is pure economics, but you need graph skills from maths to draw and interpret it correctly.
生产可能性曲线（PPC）展示了一个经济体利用其资源可以生产的两种商品的最大组合。这纯属经济学范畴，但你需要运用数学中的作图技能才能正确绘制和解读它。
Imagine a farm that can produce wheat and wool. If it uses all its land for wheat, it grows 10 tonnes. If it uses all land for sheep, it produces 8 tonnes of wool. Between these extremes, it can split resources. Plot these points and join them to form a curved line (due to increasing opportunity cost).
想象一个可以生产小麦和羊毛的农场。如果它把所有土地都种小麦，可以种出10吨小麦；如果全部用于养羊，可以生产8吨羊毛。在两个极端之间，它可以分配资源。绘制这些点并用曲线连接（因为机会成本递增）。
Question 6A (Maths & Econ): Calculate the opportunity cost of producing the 7th tonne of wool if resources are not equally efficient in both activities. Use the following coordinates: A(10 wheat, 0 wool), B(8 wheat, 3 wool), C(5 wheat, 5 wool), D(0 wheat, 8 wool).
问题 6A（数学与经济）： 如果资源在两种活动中的效率不相等，计算生产第7吨羊毛的机会成本。使用下列坐标：A(10小麦, 0羊毛), B(8小麦, 3羊毛), C(5小麦, 5羊毛), D(0小麦, 8羊毛)。
Moving from C to D: wool increases from 5 to 8 (gain 3 tonnes of wool) while wheat falls from 5 to 0 (loss of 5 tonnes). The opportunity cost per extra tonne of wool = 5 wheat divided by 3 wool ≈ 1.67 tonnes of wheat. The 7th tonne is part of this segment, so its cost is about 1.67 wheat.
从C移动到D：羊毛从5增至8（增加3吨羊毛），而小麦从5降至0（损失5吨小麦）。每多产1吨羊毛的机会成本 = 5小麦 ÷ 3羊毛 ≈ 1.67吨小麦。第7吨羊毛是这个区间的一部分，因此它的成本约为1.67吨小麦。
Question 6B (Graph analysis): Explain why the curve is bowed outward (concave) rather than a straight line. Link your answer to the idea that resources are not equally good at producing both goods.
问题 6B（图形分析）： 解释为什么曲线是向外凸的（凹向原点），而不是一条直线。将你的答案与“资源在不同商品生产上并非同样高效”这一概念联系起来。
The curve is concave because some land is better suited to wheat and some to grazing. When you try to produce more wool, you first use the best sheep land, giving little loss of wheat. As you keep shifting land, you must use fields that were excellent for wheat, so the sacrifice grows. This creates the bowed shape, which you can only understand by combining economics with geometric thinking.
曲线是凹向原点的，因为有些土地更适合种小麦，有些更适合放牧。当你试图生产更多羊毛时，一开始用的是最适合养羊的土地，小麦损失小。但随着你继续转移土地，就必须使用非常适宜种小麦的田地，于是牺牲增大。这就形成了凸状曲线，你只有把经济思维和几何思考结合起来才能理解。
7. Specialisation and the Division of Labour: Working Smarter | 专业化与劳动分工：更聪明地工作
Specialisation means concentrating on a limited range of tasks to become more efficient. This concept is vital in economics, but its power can be illustrated through a simple classroom experiment that feels like a science lab.
专业化意味着专注于有限的任务范围以提高效率。这个概念在经济中至关重要，但它的威力可以通过一个简单的课堂实验来说明，感觉就像一个科学实验。
Set up two groups making paper aeroplanes. Group Alpha uses the division of labour: one student folds the paper, another draws wings, a third tests the flight. Group Beta has each student make whole aeroplanes from start to finish. Measure how many quality aeroplanes each group produces in 10 minutes.
设立两个制作纸飞机的小组。阿尔法组使用劳动分工：一个学生负责折纸，另一个画机翼，第三个试飞。贝塔组每个学生从头到尾独立制作完整的飞机。衡量每组在10分钟内制作出多少架优质飞机。
Question 7A (Economics + Lab skills): Form a hypothesis before the experiment. Predict which group will produce more and explain why, using the terms ‘productivity’, ‘specialisation’ and ‘dexterity’.
问题 7A（经济+实验技能）： 实验前提出假设。预测哪一组会生产得更多，并用“生产率”、“专业化”和“灵巧性”解释原因。
Question 7B (Application to trade): Imagine Country A specialises in growing bananas and Country B in producing computers. Use the idea of comparative advantage to explain why they should trade, even if Country B can produce both goods more efficiently in absolute terms. Give a numeric example where Country B is 2 times better at computers but only 1.5 times better at bananas.
问题 7B（应用于贸易）： 假设A国专种香蕉，B国专产电脑。运用比较优势的概念解释为什么它们应该进行贸易，即使B国在绝对意义上两种商品都能更高效地生产。给出一个数字例子：B国生产电脑的效率是A国的2倍，但生产香蕉的效率仅是A国的1.5倍。
In the experiment, Group Alpha usually wins because the division of labour raises productivity through repetition and skill development. For trade, Country A should still focus on bananas because its opportunity cost is lower. If B produces 10 computers per worker vs A’s 5, and for bananas B produces 15 vs A’s 10, then B’s absolute advantage is larger in computers. A has a comparative advantage in bananas. Specialisation according to comparative advantage increases total output for both countries.
在实验中，阿尔法组通常会赢，因为劳动分工通过重复和技能发展提高了生产率。在贸易中，A国仍应专注于香蕉，因为它的机会成本更低。如果B国每个工人生产10台电脑而A国生产5台，香蕉方面B国生产15单位而A国生产10单位，那么B国在电脑上的绝对优势更大。A国在香蕉上具有比较优势。根据比较优势进行专业化能增加两国的总产出。
8. The Circular Flow Model: A Diagrammatic Story | 循环流动模型：图表故事
The circular flow model shows how money and resources move between households and firms. Drawing and labelling the diagram requires artistic neatness, and understanding it calls for logic. You can even add the government and the foreign sector to make it interdisciplinary with politics and global studies.
循环流动模型展现了货币和资源如何在家庭和企业之间流动。绘制并标注图表需要整洁的画图技巧，而理解它则需要逻辑。你甚至可以加入政府和外国部门，使其与政治学和全球研究形成跨学科融合。
Basic task: Draw a simple two‑sector circular flow. On one side, households supply factors of production (labour, land, capital, enterprise) to firms. On the other, firms pay wages, rent, interest and profit to households. Households then use that income to buy goods and services from firms. Add arrows and label clearly.
基础任务： 画一个简单的两部门循环流动图。一方面，家庭向企业提供生产要素（劳动力、土地、资本、企业家才能）。另一方面，企业向家庭支付工资、租金、利息和利润。家庭再用这些收入向企业购买商品和服务。加上箭头并清晰地标示。
Question 8A (Economics with citizenship): Introduce the government sector. Where does the government collect taxes and where does it inject spending? Draw a third sector on your diagram and explain the flow of tax revenue and public services.
问题 8A（经济与公民学）： 引入政府部门。政府在哪里收税，在哪里注入支出？在你的图表中画出第三个部门，并解释税收和公共服务的流动。
Question 8B (Global link): Now add the rest of the world (exports and imports). If households buy imported smartphones, how does money leave the circular flow? How do exports bring money in? Illustrate this leakage and injection on an extended diagram.
问题 8B（全球联系）： 现在加入世界其他地区（出口和进口）。如果家庭购买进口智能手机，货币如何离开循环流动？出口又如何把钱带进来？在扩展图上画出这种漏出和注入。
Taxes are a leakage from the household‑firm loop, while government spending on schools and roads is an injection. Imports represent spending leaking abroad, while exports are an injection from foreign buyers. The model becomes a map of the economy that requires understanding of international trade and public finance. Combining diagram drawing with social studies makes the topic memorable.
税收是家庭—企业循环中的漏出，而政府在学校和道路上的支出是注入。进口表示支出漏到国外，出口则是外国买家的注入。该模型成为经济地图，需要理解国际贸易和公共财政。把画图与社会研究相结合，能使这个主题令人难忘。
9. Market and Command Economies: A Political Science Lens | 市场经济与指令经济：政治学视角
All societies must answer three fundamental questions: What to produce? How to produce? For whom to produce? The way these questions are answered defines the economic system. Comparing market and command economies connects economics with politics and current affairs.
所有社会都必须回答三个基本问题：生产什么？如何生产？为谁生产？回答这些问题的方式定义了经济体系。比较市场经济和指令经济，将经济学与政治学和时事联系起来。
A market economy relies on the decisions of individuals and private firms, driven by profit motive and competition. A command economy relies on the government to make all major choices, owning resources centrally. Use real‑country examples: the United States leans towards market, while North Korea represents a command system, albeit with nuances.
市场经济依赖个人和私营企业的决策，由利润动机和竞争驱动。指令经济依赖政府做出所有重大选择，
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