Rakuten Kobo

Shopping Cart

Item(s) unavailable for purchase

Please review your cart. You can remove the unavailable item(s) now or we'll automatically remove it at Checkout.

itemsitem

- Unlimited access to eBooks
  
  Unlimited access to audiobooks
  
  No commitment, cancel anytime at kobo.com/account/subscriptions
  
  Get 1 credit every month for the audiobook of your choice
  
  No commitment, cancel anytime at kobo.com/account/subscriptions
  
  Unlimited access to eBooks
  
  Unlimited access to audiobooks
  
  No commitment, cancel anytime at kobo.com/account/subscriptions
  Audiobook
  by ,
  
  Available:
  
  . No commitment, cancel anytime at kobo.com/account/subscriptions.
  
  Pre-order
  1 audiobook monthly
  
  + FREE 30-day trial
  
  Special Offer
  
  Get 1 credit every month to exchange for an audiobook of your choice
  
  *No commitment, cancel anytime
  
  FREE

itemsitem

Unlimited access to eBooks

Unlimited access to audiobooks

No commitment, cancel anytime at kobo.com/account/subscriptions

Get 1 credit every month for the audiobook of your choice

No commitment, cancel anytime at kobo.com/account/subscriptions

Unlimited access to eBooks

Unlimited access to audiobooks

No commitment, cancel anytime at kobo.com/account/subscriptions
Audiobook
by ,

Available:
. No commitment, cancel anytime at kobo.com/account/subscriptions.

Pre-order
1 audiobook monthly

+ FREE 30-day trial

Special Offer

Get 1 credit every month to exchange for an audiobook of your choice

*No commitment, cancel anytime

FREE

Recommended For You

Student Essentials: Study Skills

by Matt Potter ...

Student Essentials: Study Skills – in one hour gives you all the skills you need when studying. Taking you step-by-step through every stage, helping you develop and refine your skills for university study success. Student Essentials: Study Skills – in one hour is packed full of jargon-free, practical advice to help you really get to grips with successful study skills. Checklists and exercises ... Read more

RM 25.09

Student Essentials: Study Skills – in one hour gives you all the skills you need when studying. Taking you step-by-step through every stage, helping you develop and refine your skills for university study success. Student Essentials: Study Skills – in one hour is packed full of jargon-free, practical advice to help you really get to grips with successful study skills. Checklists and exercises
... Read more
GED Test Prep 2025/2026 For Dummies

Book + 3 Practice Tests Online

by Tim Collins ...

Nail the GED exam and start the next chapter of your lifeA GED credential can open doors, help you get into college, and improve your job prospects. GED Test Prep 2025/2026 For Dummies is the trusted study guide full of all the info you'll need to succeed on this important high school equivalency exam. Inside, you'll find study plans, overviews of each section on the test, and insider tips. Polish ... Read more

RM 85.89

Nail the GED exam and start the next chapter of your lifeA GED credential can open doors, help you get into college, and improve your job prospects. GED Test Prep 2025/2026 For Dummies is the trusted study guide full of all the info you'll need to succeed on this important high school equivalency exam. Inside, you'll find study plans, overviews of each section on the test, and insider tips. Polish
... Read more
How to Master the BMAT

Unbeatable Preparation for Success in the BioMedical Admissions Test

by Dr. Christopher See, Chris John Tyreman ...

How to Master the BMAT will help you to maximize your UK BMAT test score in the shortest time possible with the least possible effort. With over 400 practice questions including six mock tests, it focuses on core knowledge in six key areas:-aptitude and skills-maths-physics-chemistry-biology-writing tasksAt the end of each section, a set of review questions enable you to identify and improve your ... Read more

RM 76.89

How to Master the BMAT will help you to maximize your UK BMAT test score in the shortest time possible with the least possible effort. With over 400 practice questions including six mock tests, it focuses on core knowledge in six key areas:-aptitude and skills-maths-physics-chemistry-biology-writing tasksAt the end of each section, a set of review questions enable you to identify and improve your
... Read more
Writing for University

by Jeanne Godfrey ...

Series series Pocket Study Skills
This indispensable guide shows students what successful academic writing involves and gives them the tools they will need to write successfully themselves. It separates fact from fiction and takes students through the five essential elements of academic writing: writing critically; using sources; developing your own voice; having a clear structure and style; and editing and polishing drafts. ... Read more

RM 40.69

This indispensable guide shows students what successful academic writing involves and gives them the tools they will need to write successfully themselves. It separates fact from fiction and takes students through the five essential elements of academic writing: writing critically; using sources; developing your own voice; having a clear structure and style; and editing and polishing drafts.
... Read more
Schaum's Outline of Electrical Power Systems

by Syed Nasar ...

If you want top grades and excellent understanding of electric power systems, this powerful study tool is the best tutor you can have! It takes you step-by-step through the subject and gives you accompanying related problems with fully worked solutions. You also get hundreds of additional problems to solve on your own, working at your own speed. This superb Outline clearly presents every aspect of ... Read more

RM 85.89

If you want top grades and excellent understanding of electric power systems, this powerful study tool is the best tutor you can have! It takes you step-by-step through the subject and gives you accompanying related problems with fully worked solutions. You also get hundreds of additional problems to solve on your own, working at your own speed. This superb Outline clearly presents every aspect of
... Read more
Life Skills Education for Youth

Critical Perspectives

Edited by Joan DeJaeghere, Erin Murphy-Graham ...

Series series Education (R0)
This open access volume critically reviews a diverse body of scholarship and practice that informs the conceptualization, curriculum, teaching and measurement of life skills in education settings around the world. It discusses life skills as they are implemented in schools and non-formal education, providing both qualitative and quantitative evidence of when, with whom, and how life skills do or ... Read more

Free

This open access volume critically reviews a diverse body of scholarship and practice that informs the conceptualization, curriculum, teaching and measurement of life skills in education settings around the world. It discusses life skills as they are implemented in schools and non-formal education, providing both qualitative and quantitative evidence of when, with whom, and how life skills do or
... Read more
保證得分！日檢言語知識-N5文法．文字．語彙(QR)

by 雅典日研所 ...

Series Book 17 - 日語大師
(日文書名：日本語能力試験N5完全マスター：文法＋語彙)最完整的N5文法+單字在這裡！分門別類歸納N5文法句型系統化統整N5單字最短時間內融會貫通日檢N5文法單字迅速養成日文腦本書特色詳細解說，了解文法來龍去脈畫出重點，加深觀念強化記憶文法比較，針對初學者易混淆的句型比對說明豐富例句，應試準備無死角句型總覽，將文法分門別類，同步復習相關文法延伸閱讀，活用文法觸類旁通整合單字，方便查詢以利快速記憶詞性整理，配合文法活用句型更上手 ... Read more

RM 33.11 or Free with Kobo Plus

(日文書名：日本語能力試験N5完全マスター：文法＋語彙)最完整的N5文法+單字在這裡！分門別類歸納N5文法句型系統化統整N5單字最短時間內融會貫通日檢N5文法單字迅速養成日文腦本書特色詳細解說，了解文法來龍去脈畫出重點，加深觀念強化記憶文法比較，針對初學者易混淆的句型比對說明豐富例句，應試準備無死角句型總覽，將文法分門別類，同步復習相關文法延伸閱讀，活用文法觸類旁通整合單字，方便查詢以利快速記憶詞性整理，配合文法活用句型更上手
... Read more
圖解！東大醫科生最強讀書術

讓你維持高度動機x反推式學習x疾速提高學習效率

by 河野玄斗 ...

★最有效率的學習方式盡在本書！教你如何用PDCA維持高度動機，再以反推式學習法建立學習的里程碑，最後並介紹各種馬上提高學習效率的具體方法。「假設你現在用功1000個小時，未來上班的年收入會增加100萬日圓，那麼用功念書的時薪就是100萬日圓×40年÷1000個小時＝4萬日圓。若是如此，為什麼大家還不用功呢？」學習是「只要努力的方向正確」，你所花費的時間就絕對不會背叛你，也是「性價比最高的遊戲」。學習是回饋很大的娛樂。處於可學習的環境中，也是人生中的一種享受。透過念書學到的技巧，也能運用在人生其他方面舉例來說，本書介紹了「反推學習法」這種非常厲害的學習方法。這個學習法就是「從終點開始回推，詳細列出考試（合格）之前應完成的各項作業，然後落實到時間表上，並以極高的效率完成作業」。此外，通過考試後，並不存在一眼就可看到的目標，而是必須靠自己的力量找出前進的道路並持續向前邁進。「自己的人生想做什麼. ... Read more

RM 30.84

★最有效率的學習方式盡在本書！教你如何用PDCA維持高度動機，再以反推式學習法建立學習的里程碑，最後並介紹各種馬上提高學習效率的具體方法。「假設你現在用功1000個小時，未來上班的年收入會增加100萬日圓，那麼用功念書的時薪就是100萬日圓×40年÷1000個小時＝4萬日圓。若是如此，為什麼大家還不用功呢？」學習是「只要努力的方向正確」，你所花費的時間就絕對不會背叛你，也是「性價比最高的遊戲」。學習是回饋很大的娛樂。處於可學習的環境中，也是人生中的一種享受。透過念書學到的技巧，也能運用在人生其他方面舉例來說，本書介紹了「反推學習法」這種非常厲害的學習方法。這個學習法就是「從終點開始回推，詳細列出考試（合格）之前應完成的各項作業，然後落實到時間表上，並以極高的效率完成作業」。此外，通過考試後，並不存在一眼就可看到的目標，而是必須靠自己的力量找出前進的道路並持續向前邁進。「自己的人生想做什麼.
... Read more
How to Become a Straight-A Student

The Unconventional Strategies Real College Students Use to Score High While Studying Less

by Cal Newport ...

Looking to jumpstart your GPA?Most college students believe that straight A’s can be achieved only through cramming and painful all-nighters at the library. But Cal Newport knows that real straight-A students don’t study harder—they study smarter. A breakthrough approach to acing academic assignments, from quizzes and exams to essays and papers, How to Become a Straight-A Student reveals for the ... Read more

Was RM 46.59 Now RM 38.09

Looking to jumpstart your GPA?Most college students believe that straight A’s can be achieved only through cramming and painful all-nighters at the library. But Cal Newport knows that real straight-A students don’t study harder—they study smarter. A breakthrough approach to acing academic assignments, from quizzes and exams to essays and papers, How to Become a Straight-A Student reveals for the
... Read more
Student Essentials: Critical Thinking

by Debra Hills ...

Student Essentials: Critical Thinking – in one hour helps you master the essentials of this core study skill in just 60 minutes. If you are studying for an undergraduate degree at university, critical thinking and analysis is imperative when studying and can often be the difference between an acceptable grade and a great grade. This book will help you develop the key essentials of this crucial ... Read more

RM 28.59

Student Essentials: Critical Thinking – in one hour helps you master the essentials of this core study skill in just 60 minutes. If you are studying for an undergraduate degree at university, critical thinking and analysis is imperative when studying and can often be the difference between an acceptable grade and a great grade. This book will help you develop the key essentials of this crucial
... Read more
心理咨询师国家职业资格考试热题库（二级）

by 刘桂玲 ...

心理咨询师国家职业资格考试热题库（二级）是根据国家心理咨询师国家职业资格考试二级考试大纲编写的精选知识热点考题辅导。 ... Read more

RM 13.57 or Free with Kobo Plus

心理咨询师国家职业资格考试热题库（二级）是根据国家心理咨询师国家职业资格考试二级考试大纲编写的精选知识热点考题辅导。
... Read more
A Quick Guide to Research Methods for Dissertations in Education

Are you about to start your dissertation in education? Not sure what methods to use? Providing you with an invaluable starting point, this book gives practical information about a variety of research methods, including their pros and cons, things you need to consider before using each method and crucially, what they are not suitable for. It looks at the most commonly used methods as well as some ... Read more

RM 105.29

Are you about to start your dissertation in education? Not sure what methods to use? Providing you with an invaluable starting point, this book gives practical information about a variety of research methods, including their pros and cons, things you need to consider before using each method and crucially, what they are not suitable for. It looks at the most commonly used methods as well as some
... Read more
7天考上計程車登記證-課堂講義版(2025年修訂)

by 林振崙 ...

7天考上計程車登記證-課堂講義版(2025年修訂)計程車執業登記證考試的內容和方法，包括交通法令和地理環境兩大部分。根據了題庫和答案出題比例進行統計，讓讀者可以更容易掌握重點和技巧，考試不難，但需要有一定的準備和記憶力。也收錄了許多新入門夥伴最常提出的問題和答案，涵蓋了計程車服務、收費、安全、稅務、保險等各方面的知識，讓讀者可以快速了解計程車行業的基本規範和常識。 ... Read more

RM 62.82

7天考上計程車登記證-課堂講義版(2025年修訂)計程車執業登記證考試的內容和方法，包括交通法令和地理環境兩大部分。根據了題庫和答案出題比例進行統計，讓讀者可以更容易掌握重點和技巧，考試不難，但需要有一定的準備和記憶力。也收錄了許多新入門夥伴最常提出的問題和答案，涵蓋了計程車服務、收費、安全、稅務、保險等各方面的知識，讓讀者可以快速了解計程車行業的基本規範和常識。
... Read more
Study Guide: Originals

by BookRags ...

This study guide includes the following sections: Plot Summary, Chapter Summaries & Analysis, Characters, Objects/Places, Themes, Style, Quotes, and Topics for Discussion. ... Read more

RM 39.73

This study guide includes the following sections: Plot Summary, Chapter Summaries & Analysis, Characters, Objects/Places, Themes, Style, Quotes, and Topics for Discussion.
... Read more
Klett Lektürehilfen - Naturlyrik

Interpretationshilfe für Oberstufe und Abitur

by Günter Krause ...

Series Book 8 - Klett Lektürehilfen
Literatur verstehen und interpretieren Die Natur ist ein beliebtes Motiv in der Lyrik, ob als Erlebnis- oder geheimnisvoller Bedeutungsraum, Ort der Sehnsucht oder der Erkenntnis. Durch alle Literaturepochen hindurch beschäftigen sich Dichter mit der Natur. Spannend ist dabei, wie sich das Bild im Laufe der Zeit ändert, der Mensch immer wieder neu seinen Vorstellungen anpasst. Mit Klett ... Read more

RM 32.19 or Free with Kobo Plus

Literatur verstehen und interpretieren Die Natur ist ein beliebtes Motiv in der Lyrik, ob als Erlebnis- oder geheimnisvoller Bedeutungsraum, Ort der Sehnsucht oder der Erkenntnis. Durch alle Literaturepochen hindurch beschäftigen sich Dichter mit der Natur. Spannend ist dabei, wie sich das Bild im Laufe der Zeit ändert, der Mensch immer wieder neu seinen Vorstellungen anpasst. Mit Klett
... Read more
Level A: Teacher's Guide

hm Learning & Study Skills Program

by hm Group ...

Level A: Grades 1-2Our learning & study skills program will help elementary school teachers teach their children how to learn. Essential to the program is the comprehensive Teacher's Guide. It provides a focus on the importance of study skills, directions for using the student text, and practical suggestions for both the experienced and inexperienced teacher. ... Read more

RM 103.69

Level A: Grades 1-2Our learning & study skills program will help elementary school teachers teach their children how to learn. Essential to the program is the comprehensive Teacher's Guide. It provides a focus on the importance of study skills, directions for using the student text, and practical suggestions for both the experienced and inexperienced teacher.
... Read more
Master the DSST History of the Soviet Union Exam

by Peterson's ...

The nationally recognized credit-by-exam DSST® program helps students earn college credits for learning acquired outside the traditional classroom such as; learning from on-the-job training, reading, or independent study. DSST® tests offer students a cost-effective, time-saving way to use the knowledge they've acquired outside of the classroom to accomplish their education goals.Peterson's® Master ... Read more

RM 45.79

The nationally recognized credit-by-exam DSST® program helps students earn college credits for learning acquired outside the traditional classroom such as; learning from on-the-job training, reading, or independent study. DSST® tests offer students a cost-effective, time-saving way to use the knowledge they've acquired outside of the classroom to accomplish their education goals.Peterson's® Master
... Read more
Engaging with Contemporary Challenges through Science Education Research

Selected papers from the ESERA 2019 Conference

Edited by Olivia Levrini, Giulia Tasquier, Tamer G. Amin, Laura Branchetti, Mariana Levin ...

Series series Education (R0)
This book starts with the premise that beauty can be an engine of transformation and authentic engagement in an increasingly complex world. It presents an organized picture of highlights from the 13th European Science Education Research Association Conference, ESERA 2019, held in Bologna, Italy. The collection includes contributions that discuss contemporary issues such as climate change, ... Read more

RM 583.79

This book starts with the premise that beauty can be an engine of transformation and authentic engagement in an increasingly complex world. It presents an organized picture of highlights from the 13th European Science Education Research Association Conference, ESERA 2019, held in Bologna, Italy. The collection includes contributions that discuss contemporary issues such as climate change,
... Read more
4250 8. Sınıf 2. Dönem Türkçe Öğretmenimin Yazılı Soruları

by Kolektif ...

Sınıf Öğretmenimin Yazılı Soruları• MEB ders kitapları ve öğretmenlerin yıllık planlarıyla uyumlu• Türkçe, Matematik, Fen Bilimleri, T.C. İnkılap Tarihi ve Atatürkçülük, Din Kültürü ve Ahlak Bilgisi, İngilizce derslerine yönelik 1. ve 2. dönem için yazılı kağıdı örnekleri• Her dönem için kolaydan zora doğru ilerleyen 4 farklı zorluk düzeyinde yazılı örneği• Dersin içeriğine ve sınıf düzeyine uygun ... Read more

RM 3.49

Sınıf Öğretmenimin Yazılı Soruları• MEB ders kitapları ve öğretmenlerin yıllık planlarıyla uyumlu• Türkçe, Matematik, Fen Bilimleri, T.C. İnkılap Tarihi ve Atatürkçülük, Din Kültürü ve Ahlak Bilgisi, İngilizce derslerine yönelik 1. ve 2. dönem için yazılı kağıdı örnekleri• Her dönem için kolaydan zora doğru ilerleyen 4 farklı zorluk düzeyinde yazılı örneği• Dersin içeriğine ve sınıf düzeyine uygun
... Read more
Study Guide: Cherry

by BookRags ...

This study guide includes the following sections: Plot Summary, Chapter Summaries & Analysis, Characters, Objects/Places, Themes, Style, Quotes, and Topics for Discussion. ... Read more

RM 39.73

This study guide includes the following sections: Plot Summary, Chapter Summaries & Analysis, Characters, Objects/Places, Themes, Style, Quotes, and Topics for Discussion.
... Read more
Betreuung wissenschaftlicher Arbeiten für betriebliche Praktiker

Studentische Abschlussarbeiten in der Praxis beauftragen, unterstützen und bewerten

by Ruth Melzer-Ridinger, Thilo Gamber ...

Series series essentials
Dieses Open Access essential wendet sich an Personen, die Projekt-, Bachelor- oder Masterarbeiten im Kontext einer praktischen Fragestellung beauftragen, betreuen oder begutachten. Es basiert auf zahlreichen Workshops in den Unternehmen und erläutert, wie themenspezifische Anforderungen an eine wissenschaftliche Arbeit in der Praxis erklärt werden können, wie konstruktives Feedback zu Entwürfen ... Read more

Free

Dieses Open Access essential wendet sich an Personen, die Projekt-, Bachelor- oder Masterarbeiten im Kontext einer praktischen Fragestellung beauftragen, betreuen oder begutachten. Es basiert auf zahlreichen Workshops in den Unternehmen und erläutert, wie themenspezifische Anforderungen an eine wissenschaftliche Arbeit in der Praxis erklärt werden können, wie konstruktives Feedback zu Entwürfen
... Read more
Präventionsarbeit der Polizei als pädagogische Herausforderung

Empirische Rekonstruktionen im Umgang mit Kindern und Jugendlichen

by Jürgen Kepura ...

Series series Education and Social Work (German Language)
Mit diesem Open-Access-Buch wird ein Beitrag zur Professionalisierung der Präventionsarbeit der Polizei geleistet. Polizeibeamtinnen und Polizeibeamten müssen in der täglichen Präventionspraxis unterschiedlichsten Erwartungen gleichzeitig gerecht werden. Die Akteurinnen und Akteure bewegen sich in einem Spannungsfeld, das sich zwischen einer instruierenden Normverdeutlichung und einer ... Read more

Free

Mit diesem Open-Access-Buch wird ein Beitrag zur Professionalisierung der Präventionsarbeit der Polizei geleistet. Polizeibeamtinnen und Polizeibeamten müssen in der täglichen Präventionspraxis unterschiedlichsten Erwartungen gleichzeitig gerecht werden. Die Akteurinnen und Akteure bewegen sich in einem Spannungsfeld, das sich zwischen einer instruierenden Normverdeutlichung und einer
... Read more
Las mujeres en las prisiones

La Educación Social en contextos de riesgo y conflicto

by Fanny T. Añaños ...

Series series Biblioteca De Educación
El difícil acceso a los centros penitenciarios, incluso si se consigue acceder a su interior, hace complejo el conocimiento y la comprensión de las realidades y de las vivencias de la población reclusa y de los procesos de acción-intervención que se desarrollan en ellos. Ya dentro, se comprueba que la situación de las mujeres aún más dificultosa, puesto que no sólo son una población minoritaria, ... Read more

RM 51.66 or Free with Kobo Plus

El difícil acceso a los centros penitenciarios, incluso si se consigue acceder a su interior, hace complejo el conocimiento y la comprensión de las realidades y de las vivencias de la población reclusa y de los procesos de acción-intervención que se desarrollan en ellos. Ya dentro, se comprueba que la situación de las mujeres aún más dificultosa, puesto que no sólo son una población minoritaria,
... Read more
和英ミニ辞典 17000

スマホ等で気楽に学べる試験, 留学, ビジネス等の為の総合英単語 (発音, アクセントで学ぶ英単語)

by コアボカ ...

[この辞典の特長]スマホ等でいつ、何処でも気軽に学習：スマホ等で英語をいつ、何処でも気軽に学習出来るようにコンパクトに編集した。語彙を気楽に検索：英語もしくは日本語に対応する語彙を気楽に検索できる。五十音順の配列で対応する英単語を速やかに検索：日本語の見出語を五十音順に配列し、対応する英単語を速やかに検索できるようにした。アクセント(強勢)音節に焦点：対応する英単語の場合、英語の会話/聴取/語彙力を効果的に向上させる上で最も重要なアクセント音節に焦点を合わせ、学習しているうちに英語の正しい発音と聞き取りが急速に向上できるようにした。英作、英会話、各種の試験及び大学レベル以上の英単語を収録：英語の学習に不可欠なおよそ17,000... ... Read more

RM 31.80 or Free with Kobo Plus

[この辞典の特長]スマホ等でいつ、何処でも気軽に学習：スマホ等で英語をいつ、何処でも気軽に学習出来るようにコンパクトに編集した。語彙を気楽に検索：英語もしくは日本語に対応する語彙を気楽に検索できる。五十音順の配列で対応する英単語を速やかに検索：日本語の見出語を五十音順に配列し、対応する英単語を速やかに検索できるようにした。アクセント(強勢)音節に焦点：対応する英単語の場合、英語の会話/聴取/語彙力を効果的に向上させる上で最も重要なアクセント音節に焦点を合わせ、学習しているうちに英語の正しい発音と聞き取りが急速に向上できるようにした。英作、英会話、各種の試験及び大学レベル以上の英単語を収録：英語の学習に不可欠なおよそ17,000...
... Read more

Rakuten Kobo

eReaders

Apps

Accessories

Shopping Cart

You're getting the VIP treatment!

Your Shopping Cart is empty

Available:

1 audiobook monthly

+ FREE 30-day trial

Available:

1 audiobook monthly

+ FREE 30-day trial

Recommended For You

Tests eBooks

Student Essentials: Study Skills

GED Test Prep 2025/2026 For Dummies

How to Master the BMAT

Writing for University

Schaum's Outline of Electrical Power Systems

Life Skills Education for Youth

保證得分！日檢言語知識-N5文法．文字．語彙(QR)

圖解！東大醫科生最強讀書術

How to Become a Straight-A Student

Student Essentials: Critical Thinking

心理咨询师国家职业资格考试热题库（二级）

A Quick Guide to Research Methods for Dissertations in Education

7天考上計程車登記證-課堂講義版(2025年修訂)

Study Guide: Originals

Klett Lektürehilfen - Naturlyrik

Level A: Teacher's Guide

Master the DSST History of the Soviet Union Exam

Engaging with Contemporary Challenges through Science Education Research

4250 8. Sınıf 2. Dönem Türkçe Öğretmenimin Yazılı Soruları

Study Guide: Cherry

Betreuung wissenschaftlicher Arbeiten für betriebliche Praktiker

Präventionsarbeit der Polizei als pädagogische Herausforderung

Las mujeres en las prisiones

和英ミニ辞典 17000