练习册 / Workbook
本目录为练习册的说明入口。完整 PDF:中文练习册 · English workbook。
For complete practice and same-chapter answers, use the PDFs above. See 来源与致谢 / Attribution for the selective use of the loom-notes template’s exercise and layout design.
部分历史 PDF 内仍使用旧称 Loom;这些 PDF 保持已接受的原始字节。旧项目源码路径保留,以兼容 PDF 内的源码链接。The unchanged PDFs retain legacy terminology; selected source paths remain for their embedded links.