| 摘要 | 第1-7页 |
| ABSTRACT | 第7-13页 |
| Chapter 1 Introduction | 第13-17页 |
| ·General Background of the Study | 第13-14页 |
| ·Purpose of the Present Study | 第14-15页 |
| ·Significance of the Present Study | 第15-16页 |
| ·Organization of the Thesis | 第16-17页 |
| Chapter 2 Literature Review | 第17-39页 |
| ·Defining the Key Terms | 第17-27页 |
| ·Definition of Task | 第17-18页 |
| ·Definition of Writing Tasks | 第18-19页 |
| ·Task Complexity | 第19-21页 |
| ·DM and DM Variation | 第21-27页 |
| ·Previous Researches | 第27-39页 |
| ·Researches on Task Complexity | 第27-32页 |
| ·Researches on Discourse Markers | 第32-36页 |
| ·Researches on Task Complexity and L2 Writing Performance | 第36-39页 |
| Chapter 3 Methodology | 第39-43页 |
| ·Research Questions | 第39页 |
| ·Subjects | 第39页 |
| ·Instruments | 第39-41页 |
| ·Data Collection Procedures | 第41-42页 |
| ·Data Analysis | 第42-43页 |
| Chapter 4 Results and Discussion | 第43-56页 |
| ·The Effect of Task Complexity on Variation of DMs | 第43-48页 |
| ·A General View on Students' Use of DMs | 第43-44页 |
| ·Characteristics of the Use of DM Types | 第44-46页 |
| ·Variation of DMs in Tasks of Different Complexity | 第46-48页 |
| ·The Effect of Task Complexity on Syntactic Complexity | 第48-50页 |
| ·The Effect of Task Complexity on Syntactic Accuracy | 第50-52页 |
| ·Comparison between SST and SA in Writing Performance | 第52-56页 |
| ·Comparison of CET4 Score between Two Groups | 第52-53页 |
| ·The Difference between SST and SA in DM Variation | 第53-54页 |
| ·The Difference between SST and SA in Syntactic Complexity | 第54-55页 |
| ·The Difference between SST and SA in Error Types | 第55-56页 |
| Chapter 5 Conclusion | 第56-59页 |
| ·Major Findings | 第56-57页 |
| ·Implications of the Study | 第57-58页 |
| ·Limitations of the Present Study and Suggestions for Further Research | 第58-59页 |
| Acknowledgements | 第59-60页 |
| Bibliography | 第60-64页 |
| Appendix (Ⅰ) Writing Tasks | 第64-66页 |
| Appendix (Ⅱ) Students' Writing Performance Variables | 第66-75页 |
| Publications | 第75页 |
