| Acknowledgements | 第7-8页 |
| Abstract | 第8-11页 |
| 摘要 | 第12-18页 |
| List of Abbreviations | 第18-19页 |
| Chapter One Introduction | 第19-24页 |
| 1.1 Background of the Study | 第19-21页 |
| 1.2 Purpose of the Study | 第21页 |
| 1.3 Significance of the Study | 第21-23页 |
| 1.4 Organization of the Study | 第23-24页 |
| Chapter Two Theoretical Background | 第24-34页 |
| 2.1 Speech Act Theory | 第24-26页 |
| 2.1.1 Austin’s Speech Act Theory | 第24-25页 |
| 2.1.2 Searle’s Speech Act Theory | 第25-26页 |
| 2.2 Cooperative Principle | 第26-27页 |
| 2.3 Politeness Theory | 第27-30页 |
| 2.3.1 Leech’s Politeness Principle | 第27-28页 |
| 2.3.2 Brown and Levinson’s Politeness Theory | 第28-29页 |
| 2.3.3 Gu’s Politeness Principle | 第29-30页 |
| 2.4 Cross-cultural Pragmatics | 第30-31页 |
| 2.5 Speech Act of Suggestion | 第31-34页 |
| 2.5.1 Definition | 第31-33页 |
| 2.5.2 Politeness Strategies in Making Suggestions | 第33-34页 |
| Chapter Three Literature Review | 第34-46页 |
| 3.1 Studies of Suggestion Speech Act | 第34-41页 |
| 3.1.1 Studies of Suggestion Speech Act Abroad | 第34-37页 |
| 3.1.2 Studies of Suggestion Speech Act in China | 第37-41页 |
| 3.2 Studies of Dongxiang Minority Language and Lanzhou Dialect | 第41-43页 |
| 3.2.1 Studies of Dongxiang Minority Language | 第41-42页 |
| 3.2.2 Studies of Lanzhou Dialect | 第42-43页 |
| 3.3 Pragmatic Studies of Dongxiang Minority Language | 第43-46页 |
| Chapter Four Methodology | 第46-58页 |
| 4.1 Research Questions | 第46-47页 |
| 4.2 Participants | 第47-48页 |
| 4.3 Instruments | 第48-49页 |
| 4.4 Design | 第49-53页 |
| 4.4.1 Control of Variables | 第49-50页 |
| 4.4.2 Design of Role-play Situations | 第50-52页 |
| 4.4.3 Design of Questionnaire | 第52-53页 |
| 4.5 Procedures | 第53-58页 |
| 4.5.1 Role-play | 第53-55页 |
| 4.5.2 Pilot Study | 第55-56页 |
| 4.5.3 Large-scale Questionnaire Survey | 第56页 |
| 4.5.4 Data Analysis | 第56-58页 |
| Chapter Five Results | 第58-75页 |
| 5.1 Types of Politeness Strategies in DML Suggestions | 第58-61页 |
| 5.2 Effects of Age Difference on the Politeness Strategies in DMLSuggestions | 第61-65页 |
| 5.3 Effects of Ranking of Imposition on the Politeness Strategies in DMLSuggestions | 第65-68页 |
| 5.4 Types of Politeness Strategies in LD Suggestions | 第68-70页 |
| 5.5 Similarities and Differences of Politeness Strategies between DML andLD Suggestions | 第70-75页 |
| Chapter Six Analyses and Discussion | 第75-91页 |
| 6.1 Discussion of Types of Politeness Strategies in DML Suggestions | 第75-78页 |
| 6.2 Discussion of Effects of Age Difference on Politeness Strategies in DMLSuggestions | 第78-81页 |
| 6.3 Discussion of Effects of Ranking of Imposition on Politeness Strategies inDML Suggestions | 第81-83页 |
| 6.4 Discussion of Types of Politeness Strategies in LD Suggestions | 第83-84页 |
| 6.5 Discussion of Similarities and Differences of Politeness Strategiesbetween DML and LD Suggestions | 第84-91页 |
| 6.5.1 Similarities between DML and LD Speakers’ Choices of PolitenessStrategies | 第84-86页 |
| 6.5.2 Differences between DML and LD Speakers’ Choices of PolitenessStrategies | 第86-91页 |
| Chapter Seven Conclusion | 第91-95页 |
| 7.1 Main Findings | 第91-94页 |
| 7.2 Limitation and Recommendation | 第94-95页 |
| References | 第95-101页 |
| Appendices | 第101-118页 |
| Publications of the Author | 第118页 |
