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Round 1 · Section 1 · Interactive labRound 1 · Section 1 · 互动练习

Do It Once by Hand

亲手做一遍，考场上就忘不了

18 modules on the Section 1 topics that recur most, 89 past-paper questions, 385 marks.

18 个模块，覆盖 Section 1 最常出现的专题，共 89 道真题、385 分。

Every module has the same fixed structure. It opens with the background knowledge for the topic. Then each past-paper question gets its own tab, always in the same order: the question as set; an analysis of what is given, what is asked and where the way in is; a visualisation drawn from the original figure that you can manipulate; a place to compute the answer yourself; a full worked solution with each step explained; and the traps that cost marks.

每个模块的结构都一样：先讲这一专题的背景知识，然后每道真题单独一页，顺序固定——原题；题目分析（已知什么、求什么、突破口在哪）；依原图绘制、可以拖动操作的可视化；自己动手算；每一步都有文字说明的完整解答；最后是容易丢分的易错点。

1. →Background背景知识
2. then, for each question:然后每道题：
3. 1Question原题
4. 2Analysis题目分析
5. 3Visualisation可视化
6. 4Try it yourself自己算
7. 5Full solution完整解答
8. 6Traps易错点

A correct answer earns the question’s marks; each hint you open takes a quarter off (never below a quarter), and opening the full solution first means the attempt is not scored. Progress is saved only in this browser.

答对即得该题分数；每看一条提示扣四分之一（最低保留四分之一），先看完整解答再作答则不计分。进度只保存在当前浏览器里。

Top Gold core topics · M1–M9Top Gold 核心专题 · M1–M9

Completing Section 1 · M10–M18补充 Section 1 专题 · M10–M18

For the M1–M9 core topic order, see the Top Gold plan. To find every other question on a topic, use the topic × year index, and check your answers in the Section 1 question bank.

M1–M9 核心专题的学习顺序，见 Top Gold 冲刺方案。要找某个专题的全部题目，请用专题 × 年份索引，再到 Section 1 题库核对答案。