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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[A],[B],[C]or[D]onANSWERSHEET1(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.[A]although[B]as[C]but[D]while
2.[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]detecting
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]ineffective[B]incompetent[C]inefficient[D]insufficient
15.[A]introduce[B]summon[C]trigger[D]create
16.[A]still[B]also[C]otherwise[D]nevertheless
17.[A]sure[B]sick[C]aware[D]tired
18.[A]tolerate[B]repel[C]neglect[D]notice
19.[A]available[B]reliable[C]identifiable[D]suitable
20.[A]similarto[B]suchas[C]alongwith[D]asidefrom |
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