Write a passage with the words given:
textbooks, school, levels, kinds, purpose, learn, therefore, features, information, contents, parts, page, understand, divide, sections, finally, index, alphabetical, most, help, quickly, efficiently.
The Helpful Features of Textbooks
Textbooks are books that students use in school. Students at all levels and in all kinds of schools use textbooks. They have certain features in common--features that help us find and understand the information in them.
Textbooks have tables of contents at the beginning. The tables of contents list the chapter titles, the parts of the chapters, and the page numbers of the parts. These sections are divided again into smaller parts with headings and subheadings. Finally, most textbooks have an index at the back of the book. The index lists all the topics in the book in alphabetical order, and gives their page numbers.
These are the features of most of the books. All of these features, chapters and chapter divisions, and indexes help us find and understand the information in textbooks quickly and efficiently.
教科书有益的特征
教科书是学生们在学校使用的书。不同年级的学生及各类学校的.学生都使用教科书。教科书有某些共同特征，这些特征帮助我们找到并理解书中的知识。
教科书首页都有目录，目录列出章节题目，章节分成几部分以及每一部分的页码，这些部分用标题和副标题再分成较小的部分。最后，大多数教科书的书后都有索引。
索引按字母表列出书中所有的细目并给出页码。这就是大多数教科书的特征。所有这些特征，章节和章节的细目以及索引帮助我们快速和有效地找到要了解的知识。
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