2005年全国硕士研究生入学统一考试英语试题
2005年全国硕士研究生入学统一考试英语试题SectionIUseofEnglish
Directions:
Readthefollowingtext.Choosethebestword(s)foreachnumberedblankandmark,,oronANSWERSHEET1(10points)
Thehumannoseisanunderratedtool.Humansareoftenthoughttobeinsensitivesmellerscomparedwithanimals,__1__thisislargelybecause,__2__animals,westandupright.Thismeansthatournosesare__3__toperceivingthosesmellswhichfloatthroughtheair,__4__themajorityofsmellswhichsticktosurfaces.Infact,__5__,weareextremelysensitivetosmells,__6__wedonotgenerallyrealizeit.Ournosesarecapableof__7__humansmellsevenwhentheseare__8__tofarbelowonepartinonemillion.
Strangely,somepeoplefindthattheycansmellonetypeofflowerbutnotanother,__9__othersaresensitivetothesmellsofbothflowers.Thismaybebecausesomepeopledonothavethegenesnecessarytogenerate__10__smellreceptorsinthenose.Thesereceptorsarethecellswhichsensesmellsandsend__11__tothebrain.However,ithasbeenfoundthatevenpeopleinsensitivetoacertainsmell__12__cansuddenlybecomesensitivetoitwhen__13__toitoftenenough.
Theexplanationforinsensitivitytosmellseemstobethatbrainfindsit__14__tokeepallsmellreceptorsworkingallthetimebutcan__15__newreceptorsifnecessary.Thismay__16__explainwhywearenotusuallysensitivetoourownsmellswesimplydonotneedtobe.Wearenot__17__oftheusualsmellofourownhousebutwe__18__newsmellswhenwevisitsomeoneelse’s.Thebrainfindsitbesttokeepsmellreceptors__19__forunfamiliarandemergencysignals__20__thesmellofsmoke,whichmightindicatethedangeroffire.
1.althoughasbutwhile
2.aboveunlikeexcludingbesides
3.limitedcommitteddedicatedconfined
4.catchingignoringmissingtracking
5.anywaythoughinsteadtherefore
6.evenififonlyonlyifasif
7.distinguishingdiscoveringdeterminingdetecting
8.diluteddissolveddeterminingdiffused
9.whensinceforwhereas
10.unusualparticularuniquetypical
11.signsstimulimessagesimpulses
12.atfirstatallatlargeattimes
13.subjectedleftdrawnexposed
14.ineffectiveincompetentinefficientinsufficient
15.introducesummontriggercreate
16.stillalsootherwisenevertheless
17.suresickawaretired
18.toleraterepelneglectnotice
19.availablereliableidentifiablesuitable
20.similartosuchasalongwithasidefrom
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