全国研究生入学考试英语真题.docx

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1、XX年全国研究生入学考试英语真题以下《xx年全国研究生入学考试英语真题》由出guo考研英语频道为您精心提供，欢迎大家参考。SectionIUseofEnglishDirections:Readthefollowingtext.Choosethebestword(s)foreachnumberedblankandmark[A],[B],[C]or[D]onANSWERSHEET1(10points)Thehumannoseisanunderratedtool.Humansareoftenthoughttobe

2、insensitivesmellersparedwithanimals,thisislargelybecause,animals,westandupright.Thismeansthatournosesaretoperceivingthosesmellswhichfloatthroughtheair,themajorityofsmellswhichsticktosurfaces.Infact,,weareextremelysensitivetosmells,wedonotgenerallyrealizeit

3、.Ournosesarecapableofhumansmellsevenwhenthesearetofarbelowonepartinonemillion.Strangely,somepeoplefindthattheycansmellonetypeofflowerbutnotanother,othersaresensitivetothesmellsofbothflowers.Thismaybebecausesomepeopledonothavethegenesnecessarytogeneratesmel

4、lreceptorsinthenose.Thesereceptorsarethecellswhichsensesmellsandsendtothebrain.However,ithasbeenfoundthatevenpeopleinsensitivetoacertainsmellcansuddenlybeesensitivetoitwhentoitoftenenough.Theexplanationforinsensitivitytosmellseemstobethatthebrainfindsittok

5、eepallsmellreceptorsworkingallthetimebutcannewreceptorsifnecessary.Thismayexplainwhywearenotusuallysensitivetoourownsmells—wesimplydonotneedtobe.Wearenotoftheusualsmellofourownhouse,butwenewsmellswhenwevisitsomeoneelse’s.Thebrainfindsitbesttokeepsmellrecep

6、torsforunfamiliarandemergencysignalsthesmellofsmoke,whichmightindicatethedangeroffire.1.[A]although[B]as[C]but[D]while2.[A]above[B]unlike[C]excluding[D]besides3.[A]limited[B]mitted[C]dedicated[D]confined4.[A]catching[B]ignoring[C]missing[D]tracking5.[A]any

7、way[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[C]for[D]whereas10.[A]unusual[B]particular[C]unique[D]typical11

8、.[A]signs[B]stimuli[C]messages[D]impulses12.[A]atfirst[B]atall[C]atlarge[D]attimes13.[A]subjected[B]left[C]drawn[D]exposed14.[A]ineffective[B]inpetent[C]inefficient[D]insufficient15.[A]introduce[B]summon[C]tr