Backgroundmusicmayseemharmless,butitcanhaveapowerfuleffectonthosewhohearit.Recordedbackgroundmusicfirstfounditswayintofactories,shopsandrestaurantsintheUSA.Verysoonitspreadtootherpartsoftheworld.Nowitisbecomingdifficulttogoshoppingoreatamealwithoutlisteningtobackgroundmusic.Tobeginwith,backgroundmusicwasintendedsimplytocreateasoothing(舒适的)atmosphere.Recently,however,it’sbecomingabigbusiness.AnAmericanmarketingexperthasshownthatmusiccanboostsalesorincreasefactoryproductionbyasmuchasathird.Butithastobethelightmusic.Livelymusichasnoeffectatallonsales.Slowmusiccanincreasereceipts(收入)by34%.Thisisprobablybecauseshoppersslowdownandhavemoreopportunitytospotitemstheywouldliketobuy.Yet,slowmusicisn'talwaystheanswer.Theexpertfoundthatinrestaurantsslowmusicmeantcustomerstooklongertoeattheirmeals,whichreducedoverallsales.Sorestaurantownersmightbewelladvisedtoplayfastermusictokeepthecustomersmoving－unless,ofcourse,theresultingindigestion(消化不良)leadstocomplaints.Backgroundmusicwasfirstused().
A
in the cinemas and theatres in the USA
B
in the offices and hospitals in the USA
C
in the schools and churches in the USA
D
in the factories, shops and restaurants in the USA
