南师专转本英语模拟卷1

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1、南师专转本报名电话;15861666620王老师南师专转本英语模拟卷本试卷分为第I卷（客观题）和第II卷（主观题）两部分。两卷满分150分。考试时间120分钟。第一卷（共100分）PartIReadingComprehension(共20题，每题2分，共40分)Directions:Thereare4passagesinthispart.Eachpassageisfollowedbysomequestionsorunfinishedstatements.Foreachofthemthereare4choicesmarkedA,B,CandD.Youshoulddecideon

2、thebestchoiceandmarkthecorrespondingletterontheAnswerSheetwithasinglelinethroughthecenter.PassageOneQuestions1to5arebasedonthefollowingpassage.AmericanresearchershavedevelopedatechniquethatmaybecomeanimportanttoolinfightingAIDS.ThetechniquestopstheAIDSvirusfromattackingitstarget-cellsintheb

3、ody'sdefensesystem.WhenAIDSvirusenterstheblood,itsearchesforbloodcellscalledT4lymphocytes（淋巴细胞）.ThevirusconnectstotheoutsideofT4lymphocytes,thenforcesitswayinside.Thereitdirectsthecells'genetic（基因的）materialtoproducecopiesoftheAIDSvirus.ThisishowAIDSspreads.Researchersthinktheymaybeabletosto

4、pAIDSfromspreadingbypreventingvirusfromconnectingtoT4cells.WhenAIDSvirusfindsaT4cell,itactuallyconnectstoapartofthecellcalledCD4protein.ResearcherswanttofoolthevirusbyputtingcopiesorclonesoftheCD4proteinintotheblood.ThiswaytheAIDSviruswillconnecttotheclonedproteininsteadoftherealones.Scient

5、istsusethegeneticengineeringmethodstomaketheclones.NormallyaCD4proteinremainsontheT4cellatalltimes.TheAIDSvirusmustgotoit.Inanewtechnique,however,theclonedCD4proteinisnotconnectedtoacell.Itfloatsfreely,somanymorecanbeputintothebloodtokeeptheAIDSvirusawayfromrealCD4proteinsonT4cells.Onerepor

6、tsaystheAIDSvirusconnectstotheclonedproteinsjustaseffectivelyastorealprotein.Thatreportwasbasedontestswithbloodcellsgrowninlabs.Thetechniqueisjustnowbeginningtobetestedinanimals.Ifsuccessful,itmaybetestedinhumanswithinayear.1.Thenewtechniquecan________.A.cureAIDSB.killtheAIDSvirusC.preventt

7、heAIDSvirusfromspreadingD.producenewmedicinesforAIDS2.WhentheAIDSvirusenterstheblood,itisreproducedby________.A.theinsideofthevirusitselfB.anybloodcellsinthebodyC.theCD4proteinD.thegeneticmaterialofT4cells3TheAIDSvirusconnectstoclonedproteinsinsteadoftot