| ABSTRACT | 第1-7页 |
| 摘要 | 第7-11页 |
| Chapter One Introduction | 第11-19页 |
| ·Background of the Study | 第11-12页 |
| ·Objectives of the Study | 第12-13页 |
| ·Significance of the Study | 第13-14页 |
| ·Data-collection and Analysis | 第14-16页 |
| ·Organization of the Thesis | 第16-19页 |
| Chapter Two Literature Review | 第19-37页 |
| ·Cohesion Theory | 第19-24页 |
| ·The Proposal of Cohesion | 第19-21页 |
| ·Definitions of Cohesion | 第21-22页 |
| ·Relationship between Cohesion and Coherence | 第22-24页 |
| ·Lexical Cohesion | 第24-32页 |
| ·Theoretical Researches on Lexical cohesion | 第24-28页 |
| ·Empirical Researches on Lexical Cohesion | 第28-32页 |
| ·Researches on Public Speeches | 第32-37页 |
| ·Introduction of "21 st Century Cup" National English Speaking Competition | 第32-33页 |
| ·Researches on "21st Century Cup" National English Speaking Competition | 第33-37页 |
| Chapter Three The Lexical Cohesion Theory | 第37-55页 |
| ·Lexical Cohesion | 第37-45页 |
| ·Definition of Lexical Cohesion | 第38-39页 |
| ·Importance of Lexical Cohesion in Text Organization | 第39页 |
| ·Three Influential Taxonomies of Lexical Cohesion | 第39-45页 |
| ·The Working Taxonomy of Lexical Cohesion in the Present Study | 第45-55页 |
| ·Lexical Relation | 第45-51页 |
| ·Text-bound Relation | 第51-55页 |
| Chapter Four Data Analysis and Discussion | 第55-73页 |
| ·A Sample Analysis | 第55-62页 |
| ·Identification of Lexical Cohesion in the Sample | 第56-59页 |
| ·Functions of Different Lexical Cohesive Devices in the Sample | 第59-61页 |
| ·Distribution and Frequencies of Different Lexical Cohesive Devices in the Sample Speech | 第61-62页 |
| ·Analysis and Discussion of Lexical Cohesion in all Samples | 第62-73页 |
| ·Lexical Relation | 第62-69页 |
| ·Text-bound Relation | 第69-70页 |
| ·Summary | 第70-73页 |
| Chapter Five Conclusion | 第73-77页 |
| ·Major Findings and Significance | 第73页 |
| ·Pedagogical Implications | 第73-75页 |
| ·Theoretical Implications | 第73-74页 |
| ·Methodological Implications | 第74页 |
| ·Practical Implications | 第74-75页 |
| ·Limitations and Suggestions | 第75-77页 |
| BIBLIOGRAPHY | 第77-81页 |
| APPENDIX Ⅰ:Sample Analysis | 第81-85页 |
| APPENDIX Ⅱ:Source of Data | 第85-87页 |
| APPENDIX Ⅲ:Lists of Tables | 第87-89页 |
| ACKNOWLEDGEMENTS | 第89-91页 |
| PUBLISHED PAPERS | 第91页 |
