2. 外语
  3. What is the topic of the passage? It can be inferred from the passage that the theoretical foundation of ice box should be that

What is the topic of the passage? It can be inferred from the passage that the theoretical foundation of ice box should be that

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问题 What is the topic of the passage?
It can be inferred from the passage that the theoretical foundation of ice box should be that ______.
选项
答案the melting of ice performed cooling
解析 题目询问冰盒的理论原理是什么。可以定位到文章第二段的第三句话，...for it was the melting of the ice that performed the cooling，此句大意说当时人们以为阻碍冰融化才能有效制冷，但实际上这是错误的观点，因为只有在冰的融化过程中才能有效制冷。可见冰盒的理论原理就是the melting of ice performed cooling。
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大学英语六级

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