新视野大学英语视听说教程四(第二版)单元测试八

PartIScriptDirections:Listentotheshortdialogs,andthenchoosethecorrectanswerstothequestions.Youwillheartherecordingtwice.Afterthefirstplaying,therewillbetimeforyoutochoosethecorrectanswers.Usethesecondplayingtocheckyouranswers.1.(Listentotheaudiorecordingforthequestion.)A.HedoesnotwanttoeatGMfood.B.HewantsGMfoodlabeled.C.HedoesnotcareifGMfoodislabeled.D.Heagreeswiththewoman.2.(Listentotheaudiorecordingforthequestion.)A.Themanisagainstorgancloning.B.Thewomanisagainstorgancloning.C.Themanisascientistdevotedtoorgancloning.D.Thewomanwillletherorganclonesonceitfails.3.(Listentotheaudiorecordingforthequestion.)A.Shewantsthemantogotothemeeting.B.Shewantsthemantopickupthechildren.C.Shewantstoclonetheman.D.Shedoesnotwantacloneoftheman.4.(Listentotheaudiorecordingforthequestion.)A.Thetwospeakershavealotofcommoninterests.B.ThetwospeakershavebothchosenMr.Green'selectivecourse.C.Thewomanhasalotofknowledgeongenetics.D.Themanisbeginningtolikegenetics.5.(Listentotheaudiorecordingforthequestion.)A.BoththemanandthewomanareagainstGMfood.B.BoththemanandthewomanarefortheGMfood.C.ThewomanisprobablyaconsumerofGMfoods.D.ThemanisprobablyaconsumerofGMfoods.PartIIScriptDirections:Listentothepassagethreetimes.Whenthepassageisreadforthefirsttime,listenforthegeneralidea.Whenthepassageisreadthesecondtime,fillintheblanksnumberedfrom(1)to(7)withtheexactwordsyouhear.Forblanksnumberedfrom(8)to(10),writedowneithertheexactwordsyouhearorthemainpointsinyourownwords.Whenthepassageisreadthethirdtime,checkyouranswers.Therearemanywaysinwhichhumanstemcellscanbeusedinbasicresearchandinclinicalresearch.Studiesofhumanstemcellsmay(1)yieldinformationaboutthecomplexeventsthatoccurduringhumandevelopment.Aprimarygoalofthisworkisto(2)identifyhowstemcellsbecomedividedordifferentiated(分化).Scientistsknowthatturninggenesonandoffis(3)centraltothisprocess.Someofthemostseriousmedicalconditions,suchascancerandbirthdefects,aredueto(4)abnormalcelldivisionanddifferentiation.Abetterunderstandingofthegeneticandmolecularcontrolsoftheseprocessesmayyieldinformationabout(5)howsuchdiseasesariseandsuggestnewstrategiesfortherapy.Asignificantbarrier(6)tothisuseandmostusesofstemcellsisthatscientistsdonotyetfullyunderstandthe(7)signalsthatturnspecificgenesonandofftoinfluencethedifferentiationofthestemcell.(8)Themostimportantpotentialapplicationofhumanstemcellsisperhapsthegenerationofcellsthatcouldbeusedforcell-basedtherapies.Today,donatedorgansandtissuesareoftenusedtoreplaceailingordestroyedtissue,buttheneedfortransplantabletissuesandorgansfaroutweighstheavailablesupply.(9)Stemcells,directedtodifferentiateintospecificcelltypes,willofferasourceofreplacemetotreatdiseasesincludingParkinson'sandAlzheimer'sdiseases,spinalcordinjury,stroke,burns,heartdiseaseanddiabetes.Forexample,(10)itmaybecomepossibletogeneratehealthyheartmusclecellsinthelaboratoryandthentranspl.YouranswerCorrectanswer(1)yieldyield(2)identifyidentify(3)centralcentral(4)abnormalabnormal(5)howhow(6)toto(7)signalssignals(8)ThemostimportantpotentialapplicationofhumanstemcellsisperhapsthegenerationofcellsandtissuesThemostimportantpotentialapplicationofhumanstemcellsisperhapsthegenerationofcellsandtissues(9)Stemcells,directedtodifferentiateintospecificcelltypes,willofferasourceofreplacementcellsandtissuesStemcells,directedtodifferentiateintospecificcelltypes,willofferasourceofreplacementcellsandtissues(10)itmaybecomepossibletogeneratehealthyheartmusclecellsinthelaboratoryandthentransplantthosecellsintopatientswithchronicheartdiseaseitmaybecomepossibletogeneratehealthyheartmusclecellsinthelaboratoryandthentransplantthosecellsintopatientswithchronicheartdiseasePartIIIScriptDirections:Listentothefollowingrecording,andthenchoosethecorrectanswerstothequestions.Youwillheartherecordingtwice.Afterthefirstplaying,therewillbetimeforyoutochoosethecorrectanswers.Usethesecondplayingtocheckyouranswers.1.WhatistheIcelandcompanydoing?A.CreatingadetailedmapofthegenesoftheIcelandicpeople.B.Creatingadetailedmapofallhumangenes.C.Creatingamapasdetailedasthosebysomeotherprojects.D.CreatingamaplessdetailedthanthatbytheAmericancompany.2.WhydothepeopleofIcelandpresentaspecialopportunitytostudythehumangenome?A.Icelandhasasmallpopulation.B.MostoftheIcelandershaveasmallgroupofancestors.C.Plentyofrecordsoftheirancestorsareavailable.D.Alloftheabove.3.WhyistheIcelandgenomeprojectsuperiortotheAmericangenomeproject?A.Becauseitobserves200millionpeople.B.Becauseitobserves14largefamilies.C.Becauseitobservesmorefamiliesthananyotherproject.D.Becauseitobservesmorefamiliesthanmanyotherprojects.4.Whycanthestudyofgeneshelptoidentifythecausesofdiseases?A.Smallgeneticdifferencesmayberelatedtosomediseases.B.Largegeneticdifferencesmayberelatedtosomediseases.C.Thegeneticsimilaritymaythrowlightonsomediseases.D.Similargeneswillcausesimilardiseases.5.Whatisthepassagemainlyconcernedabout?A.FindingoutthehistoryofIrishfamilies.B.FindingoutthespecialgenesofIrishpeopletocuretheirdiseases.C.Creatingadetailedhumangeneticmaptoidentifydisease-causinggenes.D.Creatingadetailedhumangene