2021英语四级听力:Plastic
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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!
树图思维导图提供 RAFT 聚合、非均相聚合、可控性、嵌段共聚物、功能化/Macromolecules/2021 在线思维导图免费制作,点击“编辑”按钮,可对 RAFT 聚合、非均相聚合、可控性、嵌段共聚物、功能化/Macromolecules/2021 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:795118b22e35ace6c19fe83b4028bd4e
树图思维导图提供 RAFT 聚合、非均相聚合、可控性、嵌段共聚物、功能化/Macromolecules/2021 在线思维导图免费制作,点击“编辑”按钮,可对 RAFT 聚合、非均相聚合、可控性、嵌段共聚物、功能化/Macromolecules/2021 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:ab5d022c55bbbb8be1f07807f5259082