"严禁未授权复制转载，第8次作业参考答案1"

The 8th homework assignment provides valuable insights into various topics covered in the textbook. The reference answer 1 offers a comprehensive understanding of the concepts discussed, making it an essential resource for students enrolled in relevant courses. The reproduction of excerpts from this work is allowed for educational purposes, enabling instructors to distribute the material to their students. However, any unauthorized reproduction or translation of the text is strictly prohibited under the United States Copyright Act. It is essential to respect the rights of the copyright owner and adhere to the legal regulations governing the use of educational materials. By following these guidelines, students and instructors can benefit from the knowledge presented in the textbook while upholding ethical and legal standards.