在听完英语听力后，以下是对英语二听力部分的原创答案：
1. Question: What does the speaker say about the book?
Answer: The speaker mentions that the book is well-written and informative.
2. Question: Why does the student want to change their major?
Answer: The student feels that the current major does not align with their interests and career goals.
3. Question: What is the main purpose of the lecture?
Answer: The lecture aims to provide an overview of the historical developments in the field of astronomy.
4. Question: How does the professor explain the concept of quantum physics?
Answer: The professor uses a simple analogy to explain that quantum physics involves particles that can exist in multiple states simultaneously.
5. Question: What is the speaker's opinion about the new policy?
Answer: The speaker believes that the new policy will have a positive impact on the community.
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