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1、5A版优质实用文档ThelinegraphcomparesaverageyearlyspendingbyAmericansonmobileandlandlinephoneservicesfrom2001to2010.Itisclearthatspendingonlandlinephonesfellsteadilyoverthe10-yearperiod,whilemobilephoneexpenditurerosequickly.Theyear2006marksthepointatwhichexpenditureonmobileservicesovertookthatf
2、orresidentialphoneservices.In2001,USconsumersspentanaverageofnearly$700onresidentialphoneservices,comparedtoonlyaround$200oncellphoneservices.Overthefollowingfiveyears,averageyearlyspendingonlandlinesdroppedbynearly$200.Bycontrast,expenditureonmobilesrosebyapproximately$300.Intheyear2006
3、,theaverageAmericanpaidoutthesameamountofmoneyonbothtypesofphoneservice,spendingjustover$500oneach.By2010,expenditureonmobilephoneshadreachedaround$750,whilethefigureforspendingonresidentialserviceshadfallentojustoverhalfthisamount.Thediagramillustratesthevariousstagesinthelifeofahoneybe
4、e.Wecanseethatthecompletelifecyclelastsbetween34and36days.Itisalsonoticeablethattherearefivemainstagesinthedevelopmentofthehoneybee,fromeggtomatureadultinsect.Thelifecycleofthehoneybeebeginswhenthefemaleadultlaysanegg;thefem5A版优质实用文档5A版优质实用文档aletypicallylaysoneortwoeggsevery3days.Between
5、9and10dayslater,eachegghatchesandtheimmatureinsect,ornymph,appears.Duringthethirdstageofthelifecycle,thenymphgrowsinsizeandshedsitsskinthreetimes.Thismoultingfirsttakesplace5daysaftertheegghatches,then7dayslater,andagainanother9dayslater.Afteratotalof30to31daysfromthestartofthecycle,they
6、oungadulthoneybeeemergesfromitsfinalmoultingstage,andinthespaceofonly4daysitreachesfullmaturity.(169words,band9)ThechartcomparesaveragefiguresfortemperatureandprecipitationoverthecourseofacalendaryearinKolkata.ItisnoticeablethatmonthlyfiguresforprecipitationinKolkatavaryconsiderably,wher
7、easmonthlytemperaturesremainrelativelystable.RainfallishighestfromJulytoAugust,whiletemperaturesarehighestinAprilandMay.BetweenthemonthsofJanuaryandMay,averagetemperaturesinKolkatarisefromtheirlowestpointataround20°Ctoapeakofjustover30°C.Averagerainfallinthecityalsoriseso
