2005年考研英语真题及答案

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1、2005年全国硕士研究生入学考试英语试题及参考答案SectionⅠUseofEnglish　　Directions：　　Readthefollowingtext.Choosethebestword（s）foreachnumberedblankandmarkA,B,CorDonANSWERSHEET1（10points）　　Thehumannoseisanunderratedtool.Humansareoftenthoughttobeinsensitivesmellerscomparedwithanimals,1thisislargelybecause,2animal

2、s,westandupright.Thismeansthatournosesare3toperceivingthosesmellswhichfloatthroughtheair,4themajorityofsmellswhichsticktosurfaces.Infact5,weareextremelysensitivetosmells,6wedonotgenerallyrealizeit.Ournosesarecapableof7humansmellsevenwhentheseare8tofarbelowonepartinonemillion.　　Strangel

3、y,somepeoplefindthattheycansmellonetypeofflowerbutnotanother,9othersaresensitivetothesmellsofbothflowers.Thismaybebecausesomepeopledonothavethegenesnecessarytogenerate10smellreceptorsinthenose.Thesereceptorsarethecellswhichsensesmellsandsend11tothebrain.However,ithasbeenfoundthatevenpe

4、opleinsensitivetoacertainsmell12cansuddenlybecomesensitivetoitwhen13toitoftenenough.　　Theexplanationforinsensitivitytosmellseemstobethatbrainfindsit14tokeepallsmellreceptorsworkingallthetimebutcan15newreceptorsifnecessary.Thismay16explainwhywearenotusuallysensitivetoourownsmellswesimpl

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

6、uding　[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]detecting　　8.[A]diluted　[

7、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]atlarg　[D]attimes　　13.[A]subjected　[B]left　[C]drawn　[D]exposed　　14.[A]ineffective　[B]