雅思作文分sk精选版.docx

雅思作文分sk精选版.docx

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雅思作文分sk精选版

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雅思作文分sk

Eatingsweetfoodsproducesacidinthemouthwhichcancausetoothdecay

Eatingsweetfoodsproducesacidinthemouth,whichcancausetoothdecay.（HighacidlevelsaremeasuredbylowpHvalues）

Describetheinformationbelowanddiscusstheimplicationsfordentalhealth.

Sampleanswer1:

Theprovidedlinegraphillustratestheacidlevelinthemouthwhichiscreatedbyconsumingsweetfoodsspecificallysugarandhoneyandpossibilityoftoothdecaybecauseofthisacidlevel.Asispresentedintheline-graph,thehighertheacidlevelthelowerthepHvalueandapHlevellessthan5.5isdetrimentalforthetoothandcausesthetoothdecay.

Thegivenlinegraphgivesinformationonamountofacidproducedinourmouthbyeatingsugarandhoneymadefromthreedifferentresourcesnamelyfruit,sugarcaneandhoney.Alsothegraphestimatesthetimetakenbythemtoreachdifferentacidlevelswhichisrelatedtothetoothdecay.（没说好没说坏，用berelatedto）

ThegivengraphshowsthattheinitialpHlevelofourmouthis7whichbeginstofallafterconsumingsweetfoods.Whenweeatsweetitemlikecanesugar,thepHleveldropsto3.5in5minutesandremainindangerlevel（belowpHlevel5.5）formorethan30minutes.ConsumingfruitsugardropsthepHlevelnearlyto4andremainsindangerlevelforabout20minutes.Andfinallywhenweeathoney,thepHlevelfallbelow5anditremainsunderrisklevelforabout13minutes.AsthelowpHlevelmeanshigheracidityandcausestoothdecay,canesugaramongthementionedthreefooditemsisthemostharmfulforourtooth.

（Approximately186words）

WhenthepHlevelinthemouthisabove5.5,acidityremainsinsuchalevelthatteethareunlikelytobeindangerfromdecay.Sweetfoods,however,causepHinthemouthtodropforatime,andthelongerthepHlevelsremainbelow5.5,thegreaterthepossibilityfordecaytooccur.Theillustrationcomparesthefruitsugar,canesugarandhoneys,whicharethemostcommoningredientsofsweetfoods,causesthepHleveltodropbelowthedangerlevelafter5minutes.

Amongthese3sweetitems,canesugardecreasethepHlevelmostquicklyandcausesthephtoremainunderthedangerlevelforthelongestperiod（over30minutes）andthusproducethegreatestriskamongthethree.Afterconsumingthecanesugar,thepHleveldropstolevel3.5andremainsthereforoverhalfanhour.Ontheotherhand,fruitsugarcausestheaciditylevelofmouthtofallunderpHlevel4in5minutesandremainsunderthreatlevelfor20minutes.FinallythehoneyappearstobelessriskyamongthethreecausesthepHleveltodropto4.7in5minutesandproceedtoabovepH5.5levelwithin15minutesofconsumption.

Inconclusionallofthesweetitemspossessthepossibilityofcausingtoothdecayandhoneyandfruitsugararelikelytocauselessdecaythanthecanesugardoes.

（Approximately271words）

（These2modelanswerscanbefollowedasexamplesofstandardanswers.However,pleasenotethereareothergoodwaysofwritingpossiblegoodanswer.）

TipsforansweringthisWritingTask1Question:

1.Pleasenotethatthequestionasksyouto"describetheinformationpresentedinthegraphandalsodiscusstheimplicationsfordentalhealth".Soyouhavetomentionwhichfooditemscreatesmoreacidlevelforlongertimeandarecomparativelyinjuriousforteeth.Youmustclassifywhichfooditemsarecomparativelysafeaswell.Firstcomparethethreefooditemsintermsoftheacidleveltheycreateinmouthandhowlongthisacidlevelremainsindangerlevel.Thensuggestwhichfooditemsamongcanesugar,fruitsugarandhoneyiscomparativelysafeandwhichitem/itemsarenot.

2.Noticethefollowingtrendsfromthegivenlinegraphs:

a）Highertheacidlevel,thelowerthepHlevel.

b）pHlevelbelow5.5isdangerousforthetoothasthetoothdecayoccursbelow5.5pHlevel.

c）HoneyiscomparativelysaferthanothertwofooditemsasitdecreasesthepHlevelofthemouthslowlyandtheacidlevelgoestothesafelevelveryquickly.OntheotherhandafterconsumingcanesugarthepHlevelfallsunderdangerlevelquicklyandremainsthereforthelongesttimeamongthethreefooditems.

3.Toanswerthisquestionfirstmentiontheacid/pHlevelwhichoccursthetoothdecayandthelevelwhenitissafe.Nowtakethethreegivenfooditemsandmentionthemindividually:

howlongerittakestoreachthepHlevelofmouthbelow5.5afterconsumingthisfooditemandthenhowlongerthislevelremainsunder5.5.Finallysuggestwhichfooditemsarecomparativelysaferandwhicharenot.

SummaryoftheLineGraph:

Afterconsumingdifferentsweetfooditems,theacidlevelofourmouthincreases.ThehigheracidlevelispresentedbythelowerpHvalue.WhenthepHvaluegetsunder5.5,thetoothdecayoccurs.Amongthegiventhreefooditemsi.e.canesugar,fruitsugarandhoney,thethirditem（honey）iscomparativelysaferforourdentalhealth.ThisisbecauseafterconsumingallthehoneythepHlevelremainsunderdangerlevelforabout12minutescomparedtothe20minutesforthefruitsugarand31minutesforcanesugar.Thisalsoindicatesthatthecanesugarismorelikelytodamageourtoothamongtheprovidedthreesweetfooditems.

SampleAnswer3:

Thebargraphillustratestheacidlevelofmouthafterconsumptionofthreedifferentnutrientssuchasfruitsugar,canesugarandhoneyovertheperiodoffortyminutes.Accordingtothebargraph,itisobviousthatcanesugaristhemostacidicnutrient.

Aftertheconsumptionofcanesugar,aciditylevelofmountincreasedsharplyinfiveminutesandreached3.5pHlevel.Fromnowonwardsaciditylevelofmouthdecreasessteadilyandreachedthenormallevelafterthirty-fiveminutes.However,teethremainedindangerouslevelmorethan25minutes.

Anotheracidicnutrientisfruitsugar.Aftertheconsumption,pHlevelofmouthdecreasedhurriedlyandreached4.25infiveminutes.Afterthat,levelofacidityofmonthreachednormallevelin15minutes.Therefore,teethremainedindangerouslevelfor15minutes.Thelastandtheleastacidicnutrientishoney,aftertheconsumptionofhoneyaciditylevelofmouthincreaseddramaticallyinfiveminutesandreached5pHlevelandthen,plateaufor5minutesandfromnowonwarddecreasedmoderately.However,teethremainedinanacidicenvironmentfor10minutes.

Toconclude,themorehazardousnutrientforteethiscanesugarbecauseteethremainedinanacidicenvironmentformorethan25minutes.

（Approximately208words）

（ThismodelanswerwassubmittedbyanIELTSStudentasacomment.）

SampleAnswer4:

Themaximumlevelofacidityproducedbysugarycontentisreached5minutesafterconsumingthemreachingupto3.5pHforsugarcane,4pHforfruitsugarand5pHforhoney.Afterthistimetheacidityleveldeclinesforcaneandfruitsugar,whereasitissustainedfor10minutesforhoney.Honeytakesapproximately15minutestoreachthepHof5.5.ItisatthispHatwhichtoothdecayisunlikely.Fruitsugartakes20minutesandcanesugartakesthemaximumtimetoreachthissafetylevel.After40minutesallthreesugarsreachneutralpHthatis7.

Aciditypromotestoothdecaywhichresultsinteethcavities.Properbrushingandmouthwashingcaneliminatesugarparticlesandmayprotectteethfromthehazardsofhighacidlevels.

Fromthegivendataitisclearthatcanesugarhashighestacidityanditsacidcontentabovesafetylevelissustainedforthelongestperiodinmouth.Thereforeitshouldbeavoided.Honeyisthesafestsugaryfoodwhichcausesleastchancesoftoothdecay.

（Approximately230words|Writtenby-AnumFaisal）

AnswersSubmittedbyIELTScandidates:

ModelAnswer1:

Thegivenlinegraphgivesinformationontheacidlevelproducedinourmouthdecayafterconsumingfruitsugar,canesugarandhoneyandcomparesthepossibleimplicationthosethreesweetfooditemshaveonourtoothdecay.Asisobservedfromthegivenpresentation,honeycausestheleasttoothdecaywhilethecanesugarpossessesthepossibilityofdecayingourtoothamongthementionedthreesweetfoods.

Thegraphshowsthatdifferentacidleveliscreatedinmouthafterweconsumedifferentsweetfooditems.HighacidlevelismeasuredbylowpHlevelandtoothdecayisoccurredwhenthepHlevelgoesbelowthe5.5.Afterweeatfruitsugar,thepHlevelofourmouthdeclinesbelow5.5in5minutesandremainindangerleveluntil13minutes.SimilarlyCanesugarcausesthepHleveltogetunderpHlevel5.5in5minutesbutitremainsindangerlevelformorethan30minuteswhichshowsthefactthatcansugarcancausemoretoothdecaythanthefruitsugar.Finally,in5minutesthepHlevelofourmouthreachestodangerlevelin5minutesafterwetakehoneyandthislevelremainindangerzoneforabout20minutes.

Thecomparisonofthethreesweetitemsindicatethatthehoneyiscomparativelysaferforourdentalhealthasitpossestheleastpossibilityoftoothdecaywhilecanesugarpossessesthemostdangertoourdentalhealthasitwouldpossiblycreatethemosttoothdecay.

（Approximately225words）

SampleAnswer2:

Thegivengraphdepictscomparisoninacidlevelinmouthafterconsumingsugar/honey.OneaxisofgraphcontainsPHlevelwhichmeasuresacidiclevelandtheotheraxisreflectstimelineafterconsuming,spacedoutequallywith5minutesgap.

Asperthegraph,toothdecaystartswhenthePHlevelfallsbeneath5.5onthescaleanditisquiteclearthatPHlevelfallsrapidlyafterconsumingallthreecommoditiesbuttookleasttimetorecoverincaseofhoneyandthemaximumisincaseofcanesugar.

Tostartwith,the