Aseachsemesterbegins，mycolleaguegreetshisstudentswearingajacketandtie．"Youmakeonlyonefirstimpression，"hesays．Sowhiletherestofthesemesterheteachesclassinhisusual，morecasualclothes，thefirstweekhe
Aseachsemesterbegins，mycolleaguegreetshisstudentswearingajacketandtie．
"Youmakeonlyonefirstimpression，"hesays．Sowhiletherestofthesemesterheteachesclassinhisusual，morecasualclothes，thefirstweekhepresentsadifferentimage．
Histhoughtisthatstudentswillremembertheirfirstmeetpositivelyandmorereadilythinkhighlyofhimasthesemestergoesonbecausethatfavorablefirstimpressionhasaninfluenceonthem．
Thesequence（顺序）thatwemeetmattersinhowwejudgesubsequent（后来的）information．Thebiginfluenceoffirstimpressionsisrelatedtothehaloeffect，wheretheperception（看法）ofpositivequalitiesinonethingorpartgivesrisetotheperceptionofsimilarqualitiesinrelatedthingsorinthewhole．
Hereisanexample：Youmeetafriendlypersonatapartyandlaterareaskedtocollectmoneyforaworthycause．Youcallthatpersonbecauseyouthinkshewillmakeacontribution．Inreality，thereisnoconnectionbetweenbeingpleasantandbeinggenerous．Yetthehaloeffectleadsyoutothinkthatthetwoarerelated．
Thehaloeffectispowerful，butitisquestionablewhetheritmattersmuchinlong-termrelationships，suchasthatbetweenteacherandstudent．Whiledressingupmaymakestudentsthinktheteachermustknowhissubjectmatterbecausehecreatesaprofessionalfirstimpression，theeffectwearsthinifthepersonturnsouttobeapoorteacherafterall．
Firstimpressionsmatterbuttheydon'thavethefinalword．Factsspeaklouder．IfyouhadneverseenorheardofEinstein，thefirsttimeyousawhimyourimpressionwouldmostlikelybenegative．Nowhisfaceisconnectedwithgenius（天才），notmadnessbecauseheisthepersonwhohascometodefinewhatgeniusis．
TheproblemisthatfewofusareEinsteinsandweoftendon'tgetthechancetochangeanegativefirstimpression．
12．Theauthorexplainsthehaloeffectmainlyby___．
A．followingtheorderofimportance
B．makingacomparison
C．settingdowngeneralrules
D．givinganexample
13．Intheauthor'seyes，thehaloeffect___．
A．issurprisinglypowerful
B．mattersmoreinthelongrun
C．makessometeachersirresponsible