The thesis can be divided into five parts: foreword, chapter one, chapter two, chapter three and chapter four.

本文的内容主要分五个部分：绪论、一、二、三、四章。

youdao

The thesis can be divided into five parts: foreword, chapter one, chapter two, chapter three and chapter four.

本文的内容主要分五个部分：绪论、一、二、三、四章。

youdao