材料成型及控制工程专业英语配套教学课件刘瑛电子课件 Unit 6.ppt

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1、Unit6EngineeringMaterialsⅡ工程材料ⅡObjective01Distinguishdifferentcrystalstructuresofmetals02Befamiliarwiththestructuralcharactersofplastics03Describetwotypesofplastics04UnderstandhowplasticsaremadeMakeclassificationsofsubstances05WarmingupWatchVideo6-1,thenfillintheblanksinFig.

2、6-1.Task1(1)Body-centeredcubic(BCC)(2)Face-centeredcubic(FCC)(3)Hexagonalclose-packed(HCP)AnswerWarmingupWatchVideo6-2,thenselecttherightstatementsfromthefollowingsentencesaccordingtowhatyouheardintheVideo.Task2(1)(3)(5)(6)AnswerWarmingupWatchVideo6-2again,andfigureoutwhicho

3、fthesearethestructuresofpolymers.Task3(c),(d)AnswerWarmingupReadthedescriptionsinthefirstcolumninTable6-1;Linkeachdescriptionwiththecorrectschematicplotandstructure.Task4(1)—(b)—(d),(2)—(a)—(c)AnswerWarmingupWatchVideo6-3,Discussingroupsandanswerfollowingquestions.Task5Answe

4、rWarmingupReadthetext;PutthefiguresinFig.6-3inrightorder.Task6AnswerLanguageStudyClassificationExample:Therearetwotypesofmetals:ferrousmetalsandnon-ferrousmetals.Thetwokindsofmetalsareferrousmetalsandnon-ferrousmetals.Metalscanbedividedintotwocategories.Theyareferrousmetalsa

5、ndnon-ferrousmetals.Wecanclassifymetalsintotwotypes:ferrousmetalsandnon-ferrousmetals.MakeclassificationforplasticsbasedontheinformationinTable6-1.Task7AnswerLanguageStudyPunctuatethefollowingsentences.Task8AnswerLanguageStudySituationPracticeWorkinpairs.Onewillexplainthecla

6、ssificationofmaterialaccordingtoFig.6-4,theothershoulddrawthegraphbasedonthelecture.Exchangeyourrolesanddoitagain.Task9SupplementReadingReadthearticleandanswerthefollowingquestions:Whatarethepropertiesofceramic(陶瓷的)materials?Whatisthedefinitionofaceramicmaterial?Howtomakecla

7、ssificationofceramicmaterialsaccordingtothisarticle?Task10SupplementReading(1)Ceramicmaterialstendtobestrong,stiff,brittle,chemicallyinert,andnon-conductorsofheatandelectricity,buttheirpropertiesvarywidely.(2)Aceramicmaterialmaybedefinedasanyinorganiccrystallinematerial,comp

8、oundedofametalandanon-metal.Itissolidandinert（惰性的）.(3)Thetwokindsofceramics