2026年英语专业四级完形填空（自然科学类）全真模拟试题

2026年英语专业四级完形填空（自然科学类）全真模拟试题考试时间：______分钟总分：______分姓名：______Therapidadvancementofbiotechnologyhasrevolutionizednumerousfields,offeringbothremarkableopportunitiesandprofoundethicalchallenges.Oneofthemostsignificantcontributionsofmodernbiotechnologyisitsapplicationinmedicine,particularlyinthedevelopmentoftargetedtherapiesforcancer.Traditionaltreatmentslikechemotherapyofteninvolveharshchemicalsthatattackallrapidlydividingcellsinthebody,leadingtoseveresideeffects.Incontrast,targetedtherapiesaredesignedtospecificallyidentifyanddestroycancercellsbytargetinguniquemolecularcharacteristicsorpathwaysthatarecrucialfortheirgrowthandsurvival.Akeycomponentoftargetedtherapyistheuseofmonoclonalantibodies(mAbs).Theselaboratory-producedantibodiesareengineeredtobindpreciselytospecificantigensfoundonthesurfaceofcancercells.Bybindingtotheseantigens,mAbscanblocksignalsthatpromotecancercellgrowth,preventcancercellsfromspreadingtootherpartsofthebody,ormarkthemfordestructionbytheimmunesystem.Forinstance,trastuzumab,marketedasHerceptin,isawell-knownmAbusedtotreatHER2-positivebreastcancer.HER2isaproteinthatpromotesthegrowthofcertainbreastcancercells;trastuzumabtargetsthisprotein,effectivelyslowingdownorstoppingcancercellproliferation.Anotherinnovativeapproachwithintargetedtherapyistheuseofsmallmoleculeinhibitors.UnlikemAbs,whicharelargeproteins,smallmoleculeinhibitorsaretypicallysmallorganiccompoundsthatcaneasilypenetratecellmembranes.Theyworkbyinhibitingspecificenzymesorproteinsthatareessentialforcancercellsurvivalandproliferation.Forexample,imatinib,knownbythebrandnameGleevec,revolutionizedthetreatmentofchronicmyeloidleukemia(CML)bytargetingtheabnormaltyrosinekinaseproteinresponsiblefortheuncontrolledgrowthofleukemiacells.Thisprecisionapproachhassignificantlyimprovedtheprognosisformanypatientswithonce-deadlycancers.Genetherapyrepresentsyetanotherfrontierintargetedcancertreatment.Thisinnovativestrategyinvolvesmodifyingapatient'sgenestoenhancetheirabilitytofightcancerortomakethemmorereceptivetootherformsoftherapy.Onemethodinvolvesintroducinggenesthatcanmakecancercellsmorevulnerabletochemotherapyorradiation.Anotherapproachinvolvesinsertinggenesthatcanproducetherapeuticsubstances,suchascytokines,whichhelpboosttheimmunesystem'sabilitytotargetcancercells.Whilestilllargelyintheexperimentalstage,genetherapyholdsimmensepromiseforthefutureofcancertreatment.Despitetheremarkableprogressintargetedtherapies,challengesremain.Thehighcostofthesetreatmentscanlimitaccessforsomepatients,andthedevelopmentofdrugresistanceremainsasignificantconcern.Moreover,notallcancershaveclearmoleculartargets,makingitdifficulttoapplythesetherapiesuniversally.Ongoingresearchaimstoaddresstheseissuesbyidentifyingnewtargets,developingmoreaffordabletreatments,andcreatingcombinationtherapiesthatusemultipleapproachestoovercomeresistance.Theintegrationoftargetedtherapiesintocancertreatmentrepresentsaparadigmshiftfromtraditionalone-size-fits-allapproachestomorepersonalizedandprecisemedicine.Asourunderstandingofthemolecularbasisofcancercontinuestogrow,thepotentialforfurtheradvancementsintargetedtherapiesisimmense.Theseinnovationsnotonlyoffernewhopeforcancerpatientsbutalsounderscorethetransformativepowerofbiotechnologyinaddressingsomeofthemostcomplexchallengesinmodernmedicine.试卷答案1.D解析：根据上下文，此处需要表示“快速发展”，选项中只有rapidly符合语境，意为“迅速地，快速地”。2.C解析：根据上下文，此处需要表示“显著的机会和深刻的伦理挑战”，选项中只有remarkableopportunitiesandprofoundethicalchallenges符合语境，意为“显著的机会和深刻的伦理挑战”。3.D解析：根据上下文，此处需要表示“设计用来”，选项中只有designedto符合语境，意为“被设计用来”。4.A解析：根据上下文，此处需要表示“独特分子特征或途径”，选项中只有molecularcharacteristicsorpathways符合语境，意为“分子特征或途径”。5.B解析：根据上下文，此处需要表示“传统治疗方法”，选项中只有Traditionaltreatments符合语境，意为“传统治疗方法”。6.A解析：根据上下文，此处需要表示“严重副作用”，选项中只有severesideeffects符合语境，意为“严重副作用”。7.C解析：根据上下文，此处需要表示“通过结合”，选项中只有bybindingto符合语境，意为“通过结合”。8.B解析：根据上下文，此处需要表示“阻止信号”，选项中只有blocksignals符合语境，意为“阻止信号”。9.D解析：根据上下文，此处需要表示“被免疫系统摧毁”，选项中只有markthemfordestructionbytheimmunesystem符合语境，意为“被免疫系统摧毁”。10.A解析：根据上下文，此处需要表示“已知抗体”，选项中只有well-knownmAb符合语境，意为“众所周知的单克隆抗体”。11.B解析：根据上下文，此处需要表示“HER2阳性乳腺癌”，选项中只有HER2-positivebreastcancer符合语境，意为“HER2阳性乳腺癌”。12.A解析：根据上下文，此处需要表示“蛋白质”，选项中只有protein符合语境，意为“蛋白质”。13.C解析：根据上下文，此处需要表示“有机化合物”，选项中只有smallorganiccompounds符合语境，意为“小有机化合物”。14.B解析：根据上下文，此处需要表示“容易渗透”，选项中只有easilypenetrate符合语境，意为“容易渗透”。15.C解析：根据上下文，此处需要表示“异常酪氨酸激酶蛋白”，选项中只有abnormaltyrosinekinaseprotein符合语境，意为“异常酪氨酸激酶蛋白”。16.D解析：根据上下文，此处需要表示“革命化了”，选项中只有revolutionized符合语境，意为“革命化了”。17.A解析：根