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1、Period1(Unit1BII)Warmingup&Listening&SpeakingI.Warmingup1.Introducesomefamousscientists.TheGerman-AmericanphysicistAlbertEinstein,b.Ulm,Germany,Mar.14,1879,d.Princeton,N.J.,Apr.18,1955,contributedmorethananyotherscientisttothe20th-centuryvisionofphysicalreality.Inthewakeof(随着...而来)WorldWarI,Ein
2、stein'stheories--especiallyhistheoryofrelativity--seemedtomanypeopletopointtoapurequalityofhumanthought,onefarremovedfromthewaranditsaftermath.Seldomhasascientistreceivedsuchpublicattentionforhavingcultivatedthefruitofpurelearning.MARIECURIEopenedupthescienceofradioactivity（放射能）.Sheisbestknowna
3、sthediscovereroftheradioactiveelements（元素）polonium（钋）andradium（镭）andasthefirstpersontowintwoNobelprizes.Forscientistsandthepublic,herradiumwasakeytoabasicchangeinourunderstandingofmatterandenergy.Herworknotonlyinfluenced（影响）thedevelopmentoffundamental（基础的）sciencebutalsoushered（引导）inanewera（纪元）i
4、nmedicalresearchandtreatment.AlfredNorthWhitehead(b.1861-d.1947),Britishmathematician,logicianandphilosopherbestknownforhisworkinmathematicallogicandthephilosophyofscience.IncollaborationwithBertrandRussell,heauthored（创造）thelandmark（里程碑）three-volumePrincipiaMathematica(1910,1912,1913)andcontrib
5、utedsignificantlytotwentieth-centurylogicandmetaphysics（形而上学）.AtthetimethatGalileoarrivedattheUniversity,somedebatehadstartedupononeofAristotle's"laws"ofnature--namely,thatthatheavierobjectsfellfasterthanlighterobjects.Aristotle'swordhadbeenacceptedasgospeltruth,andtherehadbeenfewattemptstoactu
6、allytestAristotle'sconclusionsbyactuallyconductinganexperiment!Accordingtolegend,Galileodecidedtotry.Heneededtobeabletodroptheobjectsfromagreatheight.Theperfectbuildingwasrightathand--theTowerofPisa,54meterstall.Galileoclimbeduptothetopofthebuildingcarryingavarietyofballsofvaryingsizeandweight,
7、anddumpedthemoffofthetop.Theyalllandedatthebaseofthebuildingatthesametime(legendsaysthatthedemonstrationwaswitnessedbyahugecrowdofstudentsandprofessors).Aristotlewaswrong.Whowerethey?Whatweretheyfamousfor?ScientistsContributionsQu
