江苏省2012年专转本英语真题

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1、江苏省2012年普通高校专转本统一考试PartIReadingComprehension(共20题每题2分共40分)Directions:Thereare4passagesinthispart.Eachpassageisfollowedbysomequestionsorunfinishedstatements.Foreachofthemthereare4choicesmarkedA,B,CandD.YoushoulddecideonthebestchoiceandmarkthecorrespondingletterontheAnswerSheetwithasing

2、lelinethroughthecenter.PassageOneQuestions1to5arebasedonthefollowingpassage.AmericanresearchershavedevelopedatechniquethatmaybecomeanimportanttoolinfightingAIDS.ThetechniquestopstheAIDSvirusfromattackingitstarget-cellsinthebody'sdefensesystem.WhenAIDSvirusenterstheblood,itsearchesforblo

3、odcellscalledT4lymphocytes(淋巴细胞).ThevirusconnectstotheoutsideofT4lymphocytes,thenforcesitswayinside.Thereitdirectsthecells'genetic(基因的)materialtoproducecopiesoftheAIDSvirus.ThisishowAIDSspreads.ResearchersthinktheymaybeabletostopAIDSfromspreadingbypreventingvirusfromconnectingtoT4cells

4、.WhenAIDSvirusfindsaT4cell,itactuallyconnectstoapartofthecellcalledCD4protein.ResearcherswanttofoolthevirusbyputtingcopiesorclonesoftheCD4proteinintotheblood.ThiswaytheAIDSviruswillconnecttotheclonedproteininsteadoftherealones.Scientistsusethegeneticengineeringmethodstomaketheclones.Nor

5、mallyaCD4proteinremainsontheT4cellatalltimes.TheAIDSvirusmustgotoit.Inanewtechnique,however,theclonedCD4proteinisnotconnectedtoacell.Itfloatsfreely,somanymorecanbeputintothebloodtokeeptheAIDSvirusawayfromrealCD4proteinsonT4cells.OnereportsaystheAIDSvirusconnectstotheclonedproteinsjustas

6、effectivelyastorealprotein.Thatreportwasbasedontestswithbloodcellsgrowninlabs.Thetechniqueisjustnowbeginningtobetestedinanimals.Ifsuccessful,itmaybetestedinhumanswithinayear.1.Thenewtechniquecan________.A.cureAIDSB.killtheAIDSvirusC.preventtheAIDSvirusfromspreadingD.producenewmedicinesf

7、orAIDS2.WhentheAIDSvirusenterstheblood,itisreproducedby________.A.theinsideofthevirusitselfB.anybloodcellsinthebodyC.theCD4proteinD.thegeneticmaterialofT4cells3TheAIDSvirusconnectstoclonedproteinsinsteadoftotherealonesbecause________.A.theclonedproteinsstayontheT4cellsB.theclon