| Acknowledgements | 第4-9页 |
| Abstract | 第9-11页 |
| 摘要 | 第12-14页 |
| Chapter One Introduction | 第14-19页 |
| 1.1 Research Background | 第14-15页 |
| 1.2 Research Objectives | 第15-17页 |
| 1.3 Data Collection and Text Analysis | 第17-18页 |
| 1.4 Layout of the Thesis | 第18-19页 |
| Chapter Two Literature Review | 第19-30页 |
| 2.1 Previous Studies on High School English Textbooks | 第19-22页 |
| 2.1.1 Guiding Ideologies of High School English Textbooks | 第19-20页 |
| 2.1.2 Knowledge Structures of High School English Textbooks | 第20-22页 |
| 2.2 Previous Studies on Legitimation Code Theory | 第22-28页 |
| 2.2.1 Definition of Legitimate Code and Development of LCT | 第22-24页 |
| 2.2.2 LCT and SFL | 第24-26页 |
| 2.2.3 Application of LCT in Language Teaching and Learning | 第26-28页 |
| 2.3 Summary | 第28-30页 |
| Chapter Three Legitimation Code Theory | 第30-41页 |
| 3.1 An Overview of LCT | 第30页 |
| 3.2 Knowledge Structure and Knower Structure | 第30-34页 |
| 3.2.1 Vertical and Horizontal Knowledge Structure | 第31-32页 |
| 3.2.2 Vertical and Horizontal Knower Structure | 第32页 |
| 3.2.3 Ideal Knower and Core competency | 第32-34页 |
| 3.3 Dimension of Specialization | 第34-37页 |
| 3.3.1 Epistemic Relation | 第34页 |
| 3.3.2 Social Relation | 第34-35页 |
| 3.3.3 Knowledge Code and Knower Code | 第35-37页 |
| 3.4 Dimension of Semantics | 第37-39页 |
| 3.4.1 Semantic Density | 第37-38页 |
| 3.4.2 Semantic Gravity | 第38-39页 |
| 3.5 Summary | 第39-41页 |
| Chapter Four Specialization Code in New Standard English and Look Ahead | 第41-60页 |
| 4.1 Knowledge and Knower Codes in NSE | 第41-47页 |
| 4.1.1 Introduction of NSE | 第41-42页 |
| 4.1.2 Codes in Compiling Concepts | 第42-43页 |
| 4.1.3 Codes in Reading Goals | 第43-44页 |
| 4.1.4 Codes in Reading Exercises | 第44-47页 |
| 4.2 Knowledge and Knower Code in Look Ahead | 第47-55页 |
| 4.2.1 Introduction of Look Ahead | 第48页 |
| 4.2.2 Codes in Compiling Concepts | 第48-51页 |
| 4.2.3 Codes in Reading Goals | 第51-52页 |
| 4.2.4 Codes in Reading Exercises | 第52-55页 |
| 4.3 Comparative Analysis of Specialization Codes in NSE and Look Ahead | 第55-58页 |
| 4.3.1 Knowledge Code in NSE and Look Ahead | 第56-57页 |
| 4.3.2 Knower Code in NSE and Look Ahead | 第57-58页 |
| 4.4 Summary | 第58-60页 |
| Chapter Five Semantic Code in New Standard English and Look Ahead | 第60-81页 |
| 5.1 Semantic Density in NSE and Look Ahead | 第60-70页 |
| 5.1.1 Lexical Density in Reading Passages | 第61-64页 |
| 5.1.2 Nominalization in Reading Passages | 第64-67页 |
| 5.1.3 Embedded Clause in Reading Passages | 第67-70页 |
| 5.2 Semantic Gravity in NSE and Look Ahead | 第70-76页 |
| 5.2.1 The Six Realizations of Semantic Gravity | 第71-72页 |
| 5.2.2 Semantic Gravity in NSE | 第72-74页 |
| 5.2.3 Semantic Gravity in Look Ahead | 第74-76页 |
| 5.3 Comparative Analysis of Semantic Code in NSE and Look Ahead | 第76-79页 |
| 5.3.1 Semantic Density in NSE and Look Ahead | 第76-78页 |
| 5.3.2 Semantic Gravity in NSE and Look Ahead | 第78-79页 |
| 5.4 Summary | 第79-81页 |
| Chapter Six Pedagogical Implications for High School English Teaching | 第81-89页 |
| 6.1 Implications of Specialization Codes | 第81-85页 |
| 6.1.1 Cultivation of ‘Core Competency' with NSE | 第81-83页 |
| 6.1.2 Cultivation of ‘Core Competency' with Look Ahead | 第83-85页 |
| 6.2 Implications of Semantic Codes | 第85-87页 |
| 6.2.1 Cultivation of ‘Core Competency' with NSE | 第85-86页 |
| 6.2.2 Cultivation of ‘Core Competency' with Look Ahead | 第86-87页 |
| 6.3 Summary | 第87-89页 |
| Chapter Seven Conclusion | 第89-92页 |
| 7.1 Major Findings of the Study | 第89-90页 |
| 7.2 Prospects for Further Study | 第90-92页 |
| References | 第92-95页 |
