評論
打印
Part IV Reading Comprehension ( Reading in Depth)
Section A
47. Icebox.
文章從頭到尾都在講icebox是如何產(chǎn)生的、其工作原理和優(yōu)點，可見icebox是這篇文章的中心。
48. In refrigerating freight cars and households.
題目詢問在內(nèi)戰(zhàn)后冰被用在哪些地方。根據(jù)題干關(guān)鍵詞Civil War可以定位至文章第一段第四句話，由…ice was used to refrigerate freight cars…into household use可知問題的答案。
49. Knowledge of the physics of heat.
由題干關(guān)鍵詞a science of refrigeration定位到原文第二段第二句話，….the knowledge of the physics of heat，which was essential to a science of refrigeration直接給出了問題的答案。
50. the melting of ice performed cooling
題目詢問冰盒的理論原理是什么。可以定位到文章第二段的第三句話，….for it was the melting of the ice that performed the cooling，此句大意說當(dāng)時人們以為阻礙冰融化才能有效制冷，但實際上這是錯誤的觀點，因為只有在冰的融化過程中才能有效制冷。可見冰盒的理論原理就是the melting of ice performed cooling。
51. they wanted to keep their produce cool
由題干關(guān)鍵詞farmers had to go to the market at night定位至原文最后一句話…was that farmers would no longer have to travel to market at night in order to keep their produce cool，大意是有了冰盒，他們不用再為了保證產(chǎn)品新鮮而半夜趕路去市場了。可見目的是to keep their produce cool。
