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Blues蓝调Bluesandjazzbecameverypopularinthetwentiethcentury.Apersonwho“singstheblues”feelssad.Usually,heorshelost(失去了[lɔst,lɔ:st])something-aperson,ormaybemoneyorajob.Bluesexpress(表达[ik‘spres])sadfeelings(感情['fi:liŋs])sometimesinafunnyway.Peopleplayedbluesfirstwithonlyoneortwoinstruments(乐器['ɪnstrəmənt]),forexample,aguitar,a,harmonica(口琴[hɑ:'mɔnikə]),orsometimesapiano.Sometimestheysangwithoutanyinstruments.EffectivePowerPointUsecontrastingcolorschemes(designtemplates)ThesecolorscontrastThesecolorsdon’tcontrastThesecolorscontrast(hardertoread?)Thesecolorsdon’tcontrastThesecolorscontrast(hardertoread?)EffectivePowerPoint•BeClear–Useasans-seriffont(Arial,Verdana)–Seriffontsarehardertoreadon-screen–Italicsarehardertoreadon-screen–UseboldorcolorforemphasisEffectivePowerPoint•Simpleisbest–Basiclightcoloredbackgroundanddarktext–Avoiddistractingimages–Limittransitions,animations,andsoundeffects–Don’tgethunguponlooksEffectivePowerPoint•Plan–PlanAhead(rememberyourpurpose)–PlanCarefully(getitundercontrol)–PlanforDisaster(nextmouseclick?)EffectivePowerPoint•Don’treadyourscreen–Remember,PowerPointpresentationsshouldn’tbeusedascuecards.Bulletpointsshouldpromptyou.Besides,youraudiencewillreadfasterthanyouwilltalk.Plusyourbackwillbethem.Whichleadstothenextpoint…EffectivePowerPoint•Avoidlongsentences–6wordsperline–6linesperslide–Understandingvs.OverloadEffectivePowerPointUseimagestocommunicate…EffectivePowerPoint…NottodecorateEffectivePowerPoint•Alwayssavetotheharddisk–Floppies/Zipdisksstink–Periodicallysavetonetwork–USB“Flash”drivesaregreat!EffectivePowerPoint•UsePowerPointShows–BypassthePowerPointInterface–FileSaveAs…PowerPointShow–Filenameendsin.ppsDon’tbeafraid!Whoneedsbullets?Don’tusePowerPointasacrutchSimple.Remember?EffectivePowerPoint•???