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