TreeMind树图在线AI思维导图
当前位置:树图思维导图模板资格考试英语2021大学英语四级美文赏析:The Origin of the Refrigerators思维导图

2021大学英语四级美文赏析:The Origin of the Refrigerators思维导图

  收藏
  分享
免费下载
免费使用文件
落魄潦倒 浏览量:22023-03-16 23:47:16
已被使用0次
查看详情2021大学英语四级美文赏析:The Origin of the Refrigerators思维导图

2021大学英语四级美文赏析:TheOriginoftheRefrigerators

树图思维导图提供 2021大学英语四级美文赏析:The Origin of the Refrigerators 在线思维导图免费制作,点击“编辑”按钮,可对 2021大学英语四级美文赏析:The Origin of the Refrigerators  进行在线思维导图编辑,本思维导图属于思维导图模板主题,文件编号是:79c5339bc6fbe49cb680c3d2a264423c

思维导图大纲

2021大学英语四级美文赏析:The Origin of the Refrigerators思维导图模板大纲

点击查看》》2021大学英语四级美文赏析汇总

英语四级美文:TheOriginoftheRefrigerators

Bythemid-nineteenthcentury,thetermiceboxhadenteredtheAmericanlanguage,buticewasstillonlybeginningtoaffectthedietofordinarycitizensintheUnitedStates.Theicetradegrewwiththegrowthofcities.Icewasusedinhotels,taverns,andhospitals,andbysomeforward-lookingcitydealersinfreshmeat,freshfish,andbutter.

AftertheCivilWar(1861-1865),asicewasusedtorefrigeratefreightcars,italsocameintohouseholduse.Evenbefore1880halfoftheicesoldinNewYork,Philadelphia,andBaltimore,andone-thirdofthatsoldinBostonandChicago,wenttofamiliesfortheirownuse.

Thishadbecomepossiblebecauseanewhouseholdconvenience,theicebox,aprecursorofthemodernrefrigerator,hadbeeninvented.Makinganefficienticeboxwasnotaseasyaswemightnowsuppose.Intheearlynineteenthcentury,theknowledgeofthephysicsofheat,whichwasessentialtoascienceofrefrigeration,wasrudimentary.Thecommonsensenotionthatthebesticeboxwasonethatpreventedtheicefrommeltingwasofcoursemistaken,foritwasthemeltingoftheicethatperformedthecooling.

Nevertheless,earlyeffortstoeconomizeiceincludedwrappinguptheiceinblankets,whichkepttheicefromdoingitsjob.Notuntilneartheendofthenineteenthcenturydidinventorsachievethedelicatebalanceofinsulationandcirculationneededforanefficienticebox.Butasearlyas1803,aningeniousMarylandfarmer,ThomasMoore,hadbeenontherighttrack.Whenheusedaniceboxofhisowndesigntotransporthisbuttertomarket,hisbutter,stillfreshandhardinneat,wasworthone-poundabrick.Oneadvantageofhisicebox,Mooreexplained,wasthatfarmerswouldnolongerhavetotraveltomarketatnightinordertokeeptheirproducecool.

相关思维导图模板

北京鲁迅博物馆思维导图

树图思维导图提供 北京鲁迅博物馆 在线思维导图免费制作,点击“编辑”按钮,可对 北京鲁迅博物馆  进行在线思维导图编辑,本思维导图属于思维导图模板主题,文件编号是:46dd5fb39ac0566fc4fa2033f0feb486

时态介绍思维导图

树图思维导图提供 时态介绍 在线思维导图免费制作,点击“编辑”按钮,可对 时态介绍  进行在线思维导图编辑,本思维导图属于思维导图模板主题,文件编号是:2afd76910294d6f355939784d170f8db