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1、考研英語補充資料（白皮書）2005年全國碩士研究生入學考試統(tǒng)一英語試題SectionIUseofEnglishDirections:Readthefollowingtext.Choosethebestword(s)foreachnumberedblankandmarkA,B,CorDonANSWERSHEETl.(10points)ThehumannoseisanunderratedtoolHumansareoftenthoughttobeinsensitivesmellerscomparedwithanimals,(1)________th
2、isislargelybecause,(2)________animals,westandupright,thismeansthatournosesare(3)________toperceivingthosesmellswhichfloatthroughtheair,(4)________themajorityofsmellswhichsticktosurfacesInfact,(5)________,weareextremelysensitivetosmells,(6)________wedonotgenerallyrealizeit.O
3、urnosesarecapableof(7)________humansmellsevenwhentheseare(8)________tofarbelowonepartinonemillion.Strangely,somepeoplefindthattheycansmellonetypeofflowerbutnotanother,(9)othersaresensitivetothesmellsofbothflowers.Thismaybebecausesomepeopledonothavethegenesnecessarytogenerat
4、e(10)________smellreceptorsinthenose.Thesereceptorsarethecellswhichsensesmellsandsend(11)________tothebrain.However,ithasbeenfoundthatevenpeopleinsensitivetoacertainsmell(12)________cansuddenlybecomesensitivetoitwhen(13)toitoftenenough.Theexplanationforinsensitivitytosmells
5、eemstobethatthebrainfindsit(14)________tokeepallsmellreceptorsworkingallthetimebutcan(15)________newreceptorsifnecessary.Thismay(16)________explainwhywearenotusuallysensitivetoourownsmells—wesimplydonotneedtobe.Wearenot(17)________oftheusualsmellofourownhouse,butwe(18)_____
6、___newsmellswhenwevisitsomeoneelse's.Thebrainfindsitbesttokeepsmellreceptors(19)________forunfamiliarandemergencysignals(20)________thesmellofsmoke,whichmightindicatethedangeroffire.1.[A]although[B]as[C]but[D]while2.[A]above[B]unlike[C]excluding[D]besides3.[A]limited[B]comm
7、itted[C]dedicated[D]confined4.[A]catching[B]ignoring[C]missing[D]tracking5.[A]anyway[B]though[C]instead[D]therefore6.[A]evenif[B]ifonly[C]onlyif[D]asif7.[A]distinguishing[B]discovering[C]determining[D]detecting8.[A]diluted[B]dissolved[C]dispersed[D]diffused9.[A]when[B]since
8、[C]for[D]whereas10.[A]unusual[B]particular[C]unique[D]typical11.[A]signs[B]stimuli
