| ACKNOWLEDGEMENTS | 第1-4页 |
| ABSTRACT | 第4-7页 |
| 摘要 | 第7-9页 |
| CONTENTS | 第9-11页 |
| Chapter One Introduction | 第11-15页 |
| ·Background of This Study | 第11-12页 |
| ·Aims and Significance of This Study | 第12-14页 |
| ·The Structure of This Study | 第14-15页 |
| Chapter Two Literature Review | 第15-40页 |
| ·Understanding Textbook | 第15-21页 |
| ·The definition of textbook | 第15页 |
| ·The role of English textbooks | 第15-17页 |
| ·Understanding textbook evaluation | 第17-21页 |
| ·Understanding Task | 第21-28页 |
| ·The definitions of task | 第21-26页 |
| ·Understanding task design | 第26-28页 |
| ·Related Theories for Task Design | 第28-33页 |
| ·The New National English Curriculum Standards | 第28-29页 |
| ·Communicative Competence Theory | 第29-30页 |
| ·Cognitive Learning Theory | 第30-31页 |
| ·Input Hypothesis theory | 第31-32页 |
| ·Humanism Theory | 第32-33页 |
| ·Task Evaluation ELT Materials Abroad and at Home | 第33-40页 |
| ·Related studies abroad | 第34-36页 |
| ·Related studies at home | 第36-40页 |
| Chapter Three Methodology | 第40-48页 |
| ·Research Questions | 第40页 |
| ·Research Object | 第40-42页 |
| ·Research Subjects | 第42-43页 |
| ·Research Instruments | 第43-46页 |
| ·The analysis framework of the tasks | 第43-44页 |
| ·The Questionnaire | 第44-45页 |
| ·The Interviews | 第45-46页 |
| ·Data Collection and Analysis | 第46-48页 |
| Chapter Four Findings and Discussions | 第48-87页 |
| ·The Impressionistic Evaluation on the Tasks in NSEC | 第49-60页 |
| ·The guiding ideology of NSEC | 第49-50页 |
| ·Language knowledge | 第50-55页 |
| ·Language skills | 第55-57页 |
| ·Culture awareness | 第57-58页 |
| ·Autonomous learning involved in the tasks | 第58-59页 |
| ·The positive value orientation manifested in the tasks | 第59-60页 |
| ·Analysis of the Students' Opinions toward the Tasks in NSEC | 第60-73页 |
| ·Students' general impression on NSEC | 第60-64页 |
| ·Language knowledge and language skills | 第64-68页 |
| ·Cultural consciousness,nature and science | 第68-70页 |
| ·Autonomy in learning involved in the tasks | 第70-72页 |
| ·Value orientation | 第72-73页 |
| ·Analysis of the Students' Interest and Expectation towards the Tasks | 第73-79页 |
| ·Students' interest | 第74-75页 |
| ·Students' expectation toward task contents | 第75-77页 |
| ·Language form and meaning | 第77-78页 |
| ·Pair work and group work | 第78-79页 |
| ·Analysis of the Teacher's Perspective toward the Tasks | 第79-85页 |
| ·Teachers' satisfaction towards NSEC | 第80页 |
| ·Teachers' satisfaction towards the tasks in NSEC | 第80-81页 |
| ·The reasonable proportion of English language knowledge and language skills in the tasks | 第81页 |
| ·Interest,variety and difficulty of the tasks from the teachers' perspective | 第81-84页 |
| ·The survey of culture,value orientation and students' individual difierences | 第84-85页 |
| ·Summary | 第85-87页 |
| Chapter Five Conclusion | 第87-100页 |
| ·Major Findings | 第87-88页 |
| ·Suggestions | 第88-98页 |
| ·Suggestions for development of tasks in English textbooks | 第88-91页 |
| ·Pedagogical implications | 第91-97页 |
| ·The design of ideal tasks | 第97-98页 |
| ·Limitations of the Study | 第98-100页 |
| References | 第100-104页 |
| Appendices | 第104-118页 |
| Appendix 1:The questionnaire for students | 第104-107页 |
| Appendix 2:The questions for interniews | 第107-109页 |
| Appendix 3:The tasks in NSEC(Take Unit 1 in Module 1 for example) | 第109-117页 |
| Appendix 4:A list of Abbreviations | 第117-118页 |
| 攻读学位期间发表的学术论文 | 第118-120页 |
