考研英语一完型填空专项强化真题试卷22(题后含答案及解析).pdfVIP

考研英语一完型填空专项强化真题试卷22(题后含答案及解析)

题型有：1.

Thehumannoseisanunderratedtool.Humansareoftenthoughttobe

insensitivesmellerscomparedwithanimals,【B1】thisislargelybecause,【B2】

animals,westandupright.Thismeansthatournosesare【B3】toperceivingthose

smellswhichfloatthroughtheair,【B4】themajorityofsmellswhichstickto

surfaces.Infact,【B5】,weareextremelysensitivetosmells,【B6】wedonot

generallyrealizeit.Ournosesarecapableof【B7】humansmellsevenwhenthese

are【B8】tofarbelowonepartinonemillion.Strangely,somepeoplefindthat

theycansmellonetypeofflowerbutnotanother,【B9】othersaresensitivetothe

smellsofbothflowers.Thismaybebecausesomepeopledonothavethegenes

necessarytogenerate【B10】smellreceptorsinthenose.Thesereceptorsarethe

cellswhichsensesmellsandsend【B11】tothebrain.However,ithasbeenfound

thatevenpeopleinsensitivetoacertainsmell【B12】cansuddenlybecomesensitive

toitwhen【B13】toitoftenenough.Theexplanationforinsensitivitytosmell

seemstobethatbrainfindsit【B14】tokeepallsmellreceptorsworkingallthetime

butcan【B15】newreceptorsifnecessary.Thismay【B16】explainwhyweare

notusuallysensitivetoourownsmells—wesimplydonotneedtobe.Wearenot

【B17】oftheusualsmellofourownhouse,butwe【B18】newsmellswhenwe

visitsomeoneelse’s.Thebrainfindsitbesttokeepsmellreceptors【B19】for

unfamiliarandemergencysignals【B20】thesmellofsmoke,whichmightindicate

thedangeroffire.

1．【B1】

A．although

B．as

C．but

D．while

正确答案：C

解析：逻辑关系判断。空后的一句并非是对前一句的真正原因的阐释，前后

逻辑关系更应该是转折，而非其它。

2．【B2】

A．above

B．unlike

C．excluding

D．besides

正确答案：B

解析：逻辑关系判断。前后是对比关系，应该选”