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ID:26599643
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页数:4页
时间:2018-11-27
《厦门大学2005年英语语言文学考研试题(三)》由会员上传分享,免费在线阅读,更多相关内容在教育资源-天天文库。
1、Passage3 Thetransplantationoforgansfromoneindividualtoanothernormallyinvolvestwomajorproblems:organrejectionislikelyunlessthetransplantationantigensofbothindividualsarenearlyidentical,and(2)theintroductionofanyunmatchedtransplantationantigensinducest
2、hedevelopmentbytherecipientofdonor-specificlymphocytesthatwillproduceviolentrejectionoffurthertransplantationsfromthatdonor.However,wehavefoundthatamongmanystrainsofratsthese“normal”rulesoftransplantationarenotobeyedbylivertransplants.Notonlyarelivert
3、ransplantsneverrejected,buttheyeveninduceastateofdonor-specificunresponsivenessinwhichsubsequenttransplantsofotherorgans,suchasskin,fromthatdonorareacceptedpermanently.Ourhypothesisisthat(1)manystrainsofratssimplycannotmountasufficientlyvigorousdestru
4、ctiveimmune-response(usinglymphocytes)tooutstriptheliver'srelativelygreatcapacitytoprotectitselffromimmune-responsedamageandthat(2)thesystemicunresponsivenessobservedisduetoconcentrationoftherecipient'sdonor-specificlymphocytesatthesiteofthelivertrans
5、plant. 12.Theprimarypurposeofthepassageistotreattheacceptedgeneralizationsaboutorgantransplantationinwhichofthefollowingways? (A)Explicatetheirmainfeatures (B)Suggestanalternativetothem (C)Examinetheirvirtuesandlimitations (D)Criticizethemajorevi
6、denceusedtosupportthem 13.Itcanbeinferredfromthepassagethattheauthorbelievesthatanimportantdifferenceamongstrainsofratsisthe (A)sizeoftheirlivers (B)constitutionoftheirskin (C)strengthoftheirimmune-responsereactions (D)sensitivityoftheirantigens
7、 14.Accordingtothehypothesisoftheauthor,afterasuccessfullivertransplant,thereasonthatratsdonotrejectfurthertransplantsofotherorgansfromthesamedonoristhatthe (A)transplantationantigensofthedonorandtherecipientbecomematched (B)lymphocytesoftherecipien
8、tareweakenedbytheactivityofthetransplantedliver (C)subsequentlytransplantedorganisabletorepairthedamagecausedbytherecipient'simmune-responsereaction (D)transplantedlivercontinuestobetheprimarylocusfortherecipient'simmune-responsereaction 15
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