05研究生入学考试英语试题

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1、医学考研网-中国最大的医学考研(西医综合)指导站http://www.medkaoyan.net　　05研究生入学考试英语试题　　SectionⅠUseofEnglish　　Directions:　　Readthefollowingtext.Choosethebestword(s)foreachnumberedblankandmarkA,B,CorDonANSWERSHEET1(10points)　　Thehumannoseisanunderratedtool.Humansareoftenthoughttobeinsensitivesmellerscomparedwithanimals,1

2、thisislargelybecause,2animals,westandupright.Thismeansthatournosesare3toperceivingthosesmellswhichfloatthroughtheair,4themajorityofsmellswhichsticktosurfaces.Infact　　5,weareextremelysensitivetosmells,6wedonotgenerallyrealizeit.Ournosesarecapableof7humansmellsevenwhentheseare8tofarbelowonepartinone

3、million.　　Strangely,somepeoplefindthattheycansmellonetypeofflowerbutnotanother,9othersaresensitivetothesmellsofbothflowers.Thismaybebecausesomepeopledonothavethegenesnecessarytogenerate10smellreceptorsinthenose.Thesereceptorsarethecellswhichsensesmellsandsend11tothebrain.However,ithasbeenfoundthat

4、evenpeopleinsensitivetoacertainsmell12cansuddenlybecomesensitivetoitwhen13toitoftenenough.　　Theexplanationforinsensitivitytosmellseemstobethatbrainfindsit　　14tokeepallsmellreceptorsworkingallthetimebutcan15newreceptorsifnecessary.Thismay16explainwhywearenotusuallysensitivetoourownsmellswesimplydon

5、otneedtobe.Wearenot17oftheusualsmellofourownhousebutwe18newsmellswhenwevisitsomeoneelse's.Thebrainfindsitbesttokeepsmellreceptors19forunfamiliarandemergencysignals20thesmellofsmoke,whichmightindicatethedangeroffire.　　1.[A]although[B]as[C]but[D]while　　2.[A]above[B]unlike[C]excluding[D]besides　　3.[A

6、]limited[B]committed[C]dedicated[D]confined　　4.[A]catching[B]ignoring[C]missing[D]tracking　　5.[A]anyway[B]though[C]instead[D]therefore　　6.[A]evenif[B]ifonly[C]onlyif[D]asif　　7.[A]distinguishing[B]discovering[C]determining[D]detecting13研大医学考研网QQ:800098566医学考研网-中国最大的医学考研(西医综合)指导站http://www.medkaoyan

7、.net　　8.[A]diluted[B]dissolved[C]determining[D]diffused　　9.[A]when[B]since[C]for[D]whereas　　10.[A]unusual[B]particular[C]unique[D]typical　　11.[A]signs[B]stimuli[C]messages[D]impulses　　12.[A]atfirst[B]atall[C]atla