What is the topic of the passage? [br] Where was ice used after the Civil War?In

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问题 What is the topic of the passage? [br] Where was ice used after the Civil War?

选项

答案 In refrigerating freight cars and households．

解析题目询问在内战后冰被用在哪些地方。根据题干关键词Civil War可以定位至文章第一段第四句话，由...ice was used to refrigerate freight cars...into household use可知问题的答案。

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