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1、07年考研英語沖刺班講義及內(nèi)部模擬試題?考研沖刺班講義[主講人：周固]????一：英語知識運用????05版：????Thehumannoseisanunderratedtool.Humansareoftenthoughttobeinsensitivesmellerscomparedwithanimals,(1)thisislargelybecause,(2)animals,westandupright.Thismeansthatournosesare(3)toperceivingthosesmellswh
2、ichfloatthoughtheair,(4)themajorityofsmellswhichsticktosurfaces.Infact,(5),weareextremelysensitivetosmells,(6)wedonotgenerallyrealizeit.Ournosesarecapableof(7)humansmellsevenwhentheseare(8)tofarbelowonepartinonemillion.????Strangely,somepeoplefindthattheyc
3、ansmellonetypeofflowerbutnotanother,(9)othersaresensitivetothesmellsofbothflowers.Thismaybebecausesomepeopledonothavethegenesnecessarytogenerate(10)smellreceptorsinthenose.Thesereceptorsarethecellswhichsensesmellsandsend(11)tothebrain.However,ithasbeenfoun
4、dthatevenpeopleinsensitivetoacertainsmell(12)cansuddenlybecomesensitivetoitwhen(13)toitoftenenough.????Theexplanationforinsensitivitytosmellseemstobethatbrainfindsit(14)tokeepallsmellreceptorsworkingallthetimebutcan(15)newreceptorsifnecessary.Thismay(16)ex
5、plainwhywearenotusuallysensitivetoourownsmellswesimplydonotneedtobe.Wearenot(17)oftheusualsmellofourownhousebutwe(18)newsmellswhenwevisitsomeoneelse’s.Thebrainfindsitbesttokeepsmellreceptors(19)forunfamiliarandemergencysignals(20)thesmellofsmoke,whichmight
6、indicatethedangeroffire.????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
7、.［A］evenif［B］ifonly［C］onlyif［D］asif????7.［A］distinguishing［B］discovering[C]determining［D］detecting????8.［A］diluted［B］dissolved［C］dispersed［D］diffused????9.［A］when［B］since［C］for［D］whereas????10.［A］unusual［B］particular［C］unique［D］typical????11.［A］signs［B］sti
8、muli［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［
