📚 Year 12 WJEC Economics: Complete Syllabus Breakdown | WJEC 经济 Year 12：课程大纲全面解析
Embarking on your Year 12 WJEC Economics journey can feel both exciting and daunting. This comprehensive guide breaks down the entire AS syllabus, unit by unit, so you know exactly what to expect, key concepts to master, and how to approach your exams with confidence.
踏上 Year 12 WJEC 经济学的学习之旅可能既令人兴奋又略显畏惧。这份全面指南将逐单元解析整个 AS 课程大纲，让你清楚了解学习内容、必须掌握的核心概念，以及如何自信地应对考试。
1. Course Structure and Assessment | 课程结构与评估
The WJEC AS Economics course is divided into two compulsory units. Unit 1 focuses on microeconomic principles, while Unit 2 applies macroeconomic concepts to real‑world issues. Both units are externally assessed, and students must answer a combination of short‑answer questions, data‑response exercises and extended writing tasks.
WJEC AS 经济学课程分为两个必修单元。单元一侧重于微观经济学原理，单元二则将宏观经济概念应用于现实问题。两个单元均为外部评估，学生需要解答简答题、数据回应题和长篇论述题。
Assessment Objectives (AO1–AO4) test your knowledge, ability to apply concepts, analyse economic problems and evaluate policies. A typical Unit 1 exam lasts 1 hour 15 minutes and carries 60 marks, while Unit 2 is 2 hours and carries 80 marks.
评估目标（AO1 至 AO4）考查你的知识、运用概念的能力、分析经济问题以及评估政策的能力。通常单元一考试时长为 1 小时 15 分钟，满分 60 分；单元二考试时长为 2 小时，满分 80 分。
2. The Economic Problem: Scarcity and Choice | 经济问题：稀缺性与选择
The fundamental economic problem arises because resources are limited but human wants are unlimited. This forces individuals, firms and governments to make choices, each of which involves an opportunity cost – the value of the next best alternative forgone.
基本经济问题源于资源的有限性而人类欲望的无限性。这迫使个人、企业和政府做出选择，每一个选择都涉及机会成本——即所放弃的次佳替代品的价值。
The production possibility frontier (PPF) illustrates the maximum combinations of two goods an economy can produce with its existing resources and technology. Points on the curve represent efficiency; points inside indicate underutilisation of resources.
生产可能性边界（PPF）展示了一个经济体在现有资源和技术下所能生产的两种商品的最大组合。曲线上的点代表效率；曲线内部的点则表明资源未充分利用。
Economists distinguish between positive statements
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