2022年6月大学英语四级听力美文第53篇:The Origin of the Refrigerato

2022-05-19 10:37:00来源:网络

  临近英语四级考试,多听多看文章素材,对提高作文成绩和听力水平会有帮助,为帮助广大考生提升学习效率,新东方在线英语四级频道为备考英语四级的同学们整理了“2022年6月大学英语四级听力美文第53篇:The Origin of the Refrigerators”,希望可以为大家带来帮助,一起来看看吧。

  2022年6月大学英语四级听力美文100篇

  英语四级听力美文第53篇:The Origin of the Refrigerators

  By the mid—nineteenth century, the term icebox had entered the American language, but icewas still only beginning to affect the diet of ordinary citizens in the United States. The ice tradegrew with the growth of cities. Ice was used in hotels, taverns, and hospitals, and by someforward—looking city dealers in fresh meat, fresh fish, and butter. After the Civil War (1861-1865), as ice was used to refrigerate freight cars, it also came into household use. Even before 1880 half of the ice sold in New York, Philadelphia, and Baltimore, and one—third of that sold inBoston and Chicago, went to families for their own use. This had become possible because anew household convenience, the icebox, a precursor of the modern refrigerator, had beeninvented. Making an efficient icebox was not as easy as we might now suppose. In the earlynineteenth century, the knowledge of the physics of heat, which was essential to a science ofrefrigeration, was rudimentary. The commonsense notion that the best icebox was one thatprevented the ice from melting was of course mistaken, for it was the melting of the ice thatperformed the cooling. Nevertheless, early efforts to economize ice included wrapping up theice in blankets, which kept the ice from doing its job. Not until near the end of the nineteenthcentury did inventors achieve the delicate balance of insulation and circulation needed for anefficient icebox. But as early as 1803, an ingenious Maryland farmer, Thomas Moore, hadbeen on the right track. When he used an icebox of his own design to transport his butter tomarket, his butter, still fresh and hard in neat, was worth one—pound a brick. One advantageof his icebox, Moore explained, was that farmers would no longer have to travel to market atnight in order to keep their produce cool.

  2022年6月大学英语四级听力美文100篇

  以上是新东方在线英语四级频道小编为大家带来的“2022年6月大学英语四级听力美文第53篇:The Origin of the Refrigerators”,希望考生们都能备考顺利,取得出色的成绩。


英语四级无忧计划立减1000元

扫码即刻查分 四六级最新答案

四六级好课 海量资料定期更新

更多资料
更多>>
更多内容
更多>>
更多公开课>>
更多>>
更多资料