Answer the following questions
一、简要回答下列问题(answer the following questions): 简要回答下列问题(answer 1、晶体的结合能，晶体的内能，原子间的相互作用势能有何区别？
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Group learning： Answer the questions(回答下列问题): Are you Fafa? Are you a student?
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短语
请简要回答下列问题
Briefly answer the following questions