- 阅读理解A
题干：InAmericaalone,tippingisnowa$16billion-a-yearindustry.Arecentpollshowedthat40%ofAmericansloathe(厌恶)thepractice.Consumersactingrationallyoughtnottopaymorethantheyhavetoforagivenservice.Tipsshouldnotexist.Sowhydothey?Theconventionalwisdomisthattipsbothrewardtheeffortsofgoodserviceandreduceuncomfortablefeelingsofinequality.Thebettertheservice,thebiggerthetip.ButaccordingtonewresearchfromCornellUniversity,tippingnolongerservesanyusefulfunction.Thepaperanalysesdatafrom2,547groupsdiningat20differentrestaurants.Thecorrelationbetweenlargertipsandbetterservicewasveryweak:onlyatinypartofthevariabilityinthesizeofthetiphadanythingtodowiththequalityofservice.Customerswhoratedamealas"excellent"stilltippedanywherebetween8%and37%ofthemealprice.Tippingisbetterexplainedbyculturethanbyeconomics.InAmerica,thecustomhasbecomeinstitutionalized:itisregardedaspartoftheacceptedcostofaservice.InaNewYorkrestaurant,failingtotipatleast15%couldwellmeanabusefromthewaiter.Hairdresserscanexpecttoget15－20%,themanwhodeliversyourgroceries$2.InEurope,tippingislesscommon；inmanyrestaurants，discretionary（自由决定的）tippingisbeingreplacedbyastandardservicecharge.InmanyAsiancountries,tippinghasneverreallycaughtonatall.Howtoaccountforthesenationaldifferences?AccordingtoMichaelLynn,theCornellpaper'sco-author,countriesinwhichpeoplearemoreextrovert,sociableorneurotictendtotipmore.Tippingrelievesanxietyaboutbeingservedbystrangers.And,saysMr.Lynn,"inAmerica,wherepeopleareoutgoingandexpressive,tippingisaboutsocialapproval.Ifyoutipbadly,peoplethinklessofyou.Tippingwellisachancetoshowoff."Icelanders,bycontrast,donotusuallytip--ameasureoftheirintroversion,nodoubt.Whilesuchexplanationsmaybecrude,thehardtruthseemstobethattippingdoesnotwork.Itdoesnotbenefitthecustomer.Nor,inthecaseofrestaurants,doesitactuallyencouragethewaiter,orhelptherestaurantmanagertomonitorandassesshisstaff.Servicepeopleshould"justbepaidadecentwage",whichmayactuallymakeeconomicsense.
题目： Which of the following statements best expresses the main idea of the passage?（） - A 、Tipping is very popular in America
- B 、Better service deserves bigger tip
- C 、Discretionary tipping is not reasonable
- D 、Tipping embodies one's social status
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参考答案【正确答案：C】
A项仅仅指出了文中所论述的一个现象；B项是公众的普遍看法，并非作者的观点；D项是文章后面论述的一个次要观点，并不能概括全文的主旨。
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