2005年考研英语试题

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1、2005年考研英语试题SectionⅠUseofEnglish　　Directions:　　Readthefollowingtext.Choosethebestword(s)foreachnumberedblankandmarkA,B,CorDonANSWERSHEET1(10points)　　Thehumannoseisanunderratedtool.Humansareoftenthoughttobeinsensitivesmellerscomparedwithanimals,1thisislargelybecause,2animals,west

2、andupright.Thismeansthatournosesare3toperceivingthosesmellswhichfloatthroughtheair,4themajorityofsmellswhichsticktosurfaces.Infact　　5,weareextremelysensitivetosmells,6wedonotgenerallyrealizeit.Ournosesarecapableof7humansmellsevenwhentheseare8tofarbelowonepartinonemillion.　　Stra

3、ngely,somepeoplefindthattheycansmellonetypeofflowerbutnotanother,9othersaresensitivetothesmellsofbothflowers.Thismaybebecausesomepeopledonothavethegenesnecessarytogenerate10smellreceptorsinthenose.Thesereceptorsarethecellswhichsensesmellsandsend11tothebrain.However,ithasbeenfou

4、ndthatevenpeopleinsensitivetoacertainsmell12cansuddenlybecomesensitivetoitwhen13toitoftenenough.　　Theexplanationforinsensitivitytosmellseemstobethatbrainfindsit　　14tokeepallsmellreceptorsworkingallthetimebutcan15newreceptorsifnecessary.Thismay16explainwhywearenotusuallysensitiv

5、etoourownsmellswesimplydonotneedtobe.Wearenot17oftheusualsmellofourownhousebutwe18newsmellswhenwevisitsomeoneelse's.Thebrainfindsitbesttokeepsmellreceptors19forunfamiliarandemergencysignals20thesmellofsmoke,whichmightindicatethedangeroffire.　　1.［A］although［B］as［C］but［D］while　　2

6、.［A］above［B］unlike［C］excluding［D］besides　　3.［A］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］detectin

7、g　　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］atlarge［D］attimes　　13.［A］subjected［B］left［C］drawn［D］exposed　　14.［A］ineffe

8、ctive［B］incompetent［C］inefficient［D］insufficient　　15.［