| Acknowledgements | 第1-4页 |
| Abstract | 第4-7页 |
| 摘要 | 第7-12页 |
| Chapter One Introduction | 第12-15页 |
| ·General Description of the Study | 第12页 |
| ·Motivations for the Study | 第12-13页 |
| ·Significance of the Study | 第13-14页 |
| ·Structure of the Thesis | 第14-15页 |
| Chapter Two Literature Review | 第15-33页 |
| ·Definitions of Key Terms | 第15-21页 |
| ·Halliday and Hasan’s Conception of Lexical Cohesion | 第15-17页 |
| ·Hoey’s Conception of Lexical Cohesion | 第17-19页 |
| ·Categorization and Definitions of Lexical Cohesion in the Present Study | 第19-21页 |
| ·Related Theoretical Studies | 第21-25页 |
| ·The Concepts of Cohesion and Coherence | 第22-23页 |
| ·The Relationship between Cohesion and Coherence | 第23-24页 |
| ·The Significance of Lexical Cohesion | 第24-25页 |
| ·Related Empirical Studies | 第25-33页 |
| ·Related Empirical Studies on Lexical Cohesion | 第25-29页 |
| ·Related Empirical Studies Abroad | 第26-28页 |
| ·Related Empirical Studies at Home | 第28-29页 |
| ·Related Empirical Studies on Development in L2 Writing | 第29-33页 |
| ·Cross-sectional Studies | 第30-31页 |
| ·Longitudinal Studies | 第31-33页 |
| Chapter Three Methodology | 第33-40页 |
| ·Research Questions | 第33-34页 |
| ·Research Design | 第34-40页 |
| ·Corpus Description | 第34-35页 |
| ·Data Collection | 第35-36页 |
| ·Data Analysis | 第36-40页 |
| ·Tagging of the Writing | 第36-38页 |
| ·Calculation | 第38-39页 |
| ·Comparison | 第39-40页 |
| Chapter Four Results and Discussion | 第40-61页 |
| ·General Description of Lexical Cohesion in English Majors’Argumentative Writing | 第40-41页 |
| ·Developmental Patterns of Lexical Cohesion in English Majors’Argumentative Writing in terms of Simple Repetition and Complex Repetition | 第41-49页 |
| ·Developmental Pattern of Simple Repetition | 第41-45页 |
| ·Developmental Pattern of Complex Repetition | 第45-49页 |
| ·Developmental Patterns of Lexical Cohesion in English Majors’Argumentative Writing in terms of Synonymy and Antonymy | 第49-55页 |
| ·Developmental Pattern of Synonymy | 第49-52页 |
| ·Developmental Pattern of Antonymy | 第52-55页 |
| ·Developmental Patterns of Lexical Cohesion in English Majors’Argumentative Writing in terms of Hyponymy and Meronymy | 第55-61页 |
| ·Developmental Pattern of Hyponymy | 第56-58页 |
| ·Developmental Pattern of Meronymy | 第58-61页 |
| Chapter Five Conclusion | 第61-64页 |
| ·Summary of the Major Findings | 第61-62页 |
| ·Pedagogical Implications | 第62-63页 |
| ·Limitations and Suggestions for Further Studies | 第63-64页 |
| References | 第64-67页 |
| Appendixes | 第67-75页 |
| Appendix I Complex repetition used by four grades | 第67-69页 |
| Appendix II Synonymy used by four grades | 第69-72页 |
| Appendix III Antonymy used by four grades | 第72-73页 |
| Appendix IV Frequency of lexical cohesive ties | 第73-75页 |
| Table 1: Frequency of lexical cohesive ties used by Grade 1 | 第73页 |
| Table 2: Frequency of lexical cohesive ties used by Grade 2 | 第73-74页 |
| Table 3: Frequency of lexical cohesive ties used by Grade 3 | 第74页 |
| Table 4: Frequency of lexical cohesive ties used by Grade 4 | 第74-75页 |
