| 摘要 | 第1-6页 |
| Abstract | 第6-9页 |
| Chapter One Introduction | 第9-20页 |
| ·An Overview of Teaching Approaches in English Writing | 第9-12页 |
| ·Topic of this Thesis and Significance | 第12-18页 |
| ·Product Approach | 第13-14页 |
| ·Process Approach | 第14-17页 |
| ·Definition | 第15-16页 |
| ·Descriptions of Writing Process under Process Approach | 第16-17页 |
| ·Significance of Lexical-level Research in Teaching of English Writing | 第17-18页 |
| ·Layout of the thesis | 第18-20页 |
| Chapter Two Literature Review | 第20-34页 |
| ·Lexical Chunks | 第20-28页 |
| ·Definition of Lexical Chunks | 第20-23页 |
| ·Classification of Lexical Chunks | 第23-25页 |
| ·Functions of Lexical Chunks | 第25-27页 |
| ·Summary | 第27-28页 |
| ·Lexical richness | 第28-34页 |
| ·Notions and Definition | 第28-29页 |
| ·Previous studies | 第29页 |
| ·Measurements Defined by Different Researchers | 第29-30页 |
| ·Clarification of Relevant Technical Terms | 第30-33页 |
| ·Summary | 第33-34页 |
| Chapter Three Research on Lexical Chunks | 第34-46页 |
| ·Research Questions | 第34页 |
| ·Participants | 第34-35页 |
| ·Instruments | 第35页 |
| ·Data Collection | 第35-37页 |
| ·Data Analysis | 第37-46页 |
| ·Quantitative Analysis | 第37-43页 |
| ·Correlation between Total Numbers of Chunks and Scores | 第38-39页 |
| ·Correlation between Numbers of Poly-words and Scores | 第39页 |
| ·Correlation between Numbers of Institutionalized Expressions and Scores | 第39-40页 |
| ·Correlation between Numbers of Phrasal Constraints and Scores | 第40-41页 |
| ·Correlation between Numbers of Sentence Builders and Scores | 第41-42页 |
| ·Correlation between Numbers of Tokens and Scores | 第42-43页 |
| ·Qualitative Analysis | 第43-46页 |
| ·Challenges from Samples to Statistic Results | 第43-45页 |
| ·Other Problems Revealed Related to Chunk Application | 第45-46页 |
| Chapter Four Research on Lexical Richness | 第46-53页 |
| ·Research Questions | 第46页 |
| ·Participants | 第46页 |
| ·Instruments | 第46页 |
| ·Data Collection | 第46-47页 |
| ·Data Analysis | 第47-53页 |
| ·Quantitative Analysis | 第48-50页 |
| ·Qualitative Analysis | 第50-53页 |
| Chapter Five Comparison Research | 第53-56页 |
| ·Experiment Design | 第53-56页 |
| ·Purpose & Subjects | 第53页 |
| ·Process | 第53-54页 |
| ·Data Analysis | 第54-56页 |
| Chapter Six Conclusion | 第56-58页 |
| Bibliography | 第58-62页 |
| Acknowledgements | 第62-63页 |
| Appendix | 第63-65页 |
