2021英语四级听力:Plastic
树图思维导图提供 2021英语四级听力:Plastic 在线思维导图免费制作,点击“编辑”按钮,可对 2021英语四级听力:Plastic 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:f7b7893c71f6f421bf5464a13d840409
2021英语四级听力:Plastic思维导图模板大纲
Weuseplasticwraptoprotectourfoods.Weputourgarbageinplasticbagsorplasticcans.Wesitonplasticchairs,playwithplastictoys,drinkfromplasticcups,andwashourhairwithshampoofromplasticbottles!
Plasticdoesnotgrowinnature.Itismadebymixingcertainthingstogether.Wecallitaproducedormanufacturedmaterial.Plasticwasfirstmadeinthe1860sfromplants,suchaswoodandcotton.Thatplasticwassoftandburnedeasily.
Thefirstmodernplasticsweremadeinthe1930s.Mostclearplasticstartsoutasthick,blackoil.Thatplasticcoatinginsideapanbeginsasnaturalgas.
Overtheyears,hundredsofdifferentplasticshavebeendeveloped.Somearehardandstrong.Somearesoftandbendable.Someareclear.Somearemany-colored.Thereisaplasticforalmosteveryneed.Scientistscontinuetoexperimentwithplastics.Theyhopetofindevenwaystousethem!