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大学英语演讲_1.docx

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大学英语演讲 大学英语演讲(15篇)大学英语演讲1Ifyou'remiddle-agedandyourmemory'snotwhatitusedtobe,checkthebathroomscale,researcherswarned,suggestingoverweightpeopletendtoscoremorepoorlyontestsofmemorythantheirthinnerpeersdo.Thefindingssuggestthataheavierweightinmiddleagemaymeanahigherriskofdementialaterinlife.ReportinginthejournalNeurology,theresearchersspeculatedthathigherratesofcardiovasculardiseaseordiabetesmighthelpexplainthelink.Butit'salsopossiblethatsubstancesproducedbyfatcells,suchasthehormoneleptin,havedirecteffectsonthebrain.Thestudycomparedmentalabilitiestobodymassindex(BMI),ameasurementofweightinrelationtoheightusedtodefineoverweightandobesity.ABMIof25ormoreindicatesoverweight,and30ormoreisobese.ThestudyalsoinvestigatedtherelationshipsbetweenBMIandcognitivefunctionin2,223healthymenandwomenbetweentheagesof32and62inFrancethroughtheuseoffourcognitivetests.ThestudyfoundahigherBMIwasassociatedwithlowercognitivetestscores.ResultsfromatestinvolvingwordmemoryrecallshowpeoplewithaBMIof20rememberedanaverageofnineoutof16words,whilepeoplewithaBMIof30rememberedanaverageofsevenoutof16words.大学英语演讲2Iamproudofbeingacollegestudent.Ilikemycollegelifeasitissowonderfultimeinmyyouth.Asbeingborninsmallvillageoftheremotecountryside，Ididn'thaveagoodeducationenvironment.However，Isetagoalandfeltconfidenttobeacollegestudent.Afterhardstudy，Ipassedtheentranceexaminationofnationalcollegebyexcellentachievement.Allpeoplewereproudofme，asIwasthefirstcollegestudentinmyvillage.IwasfarewellwarmlybythemwhenIcametoschool.Iwaswarmlywelcomebyschool，too.Afterthen，I’vefeltmystudyisnotonlyformyselfbutalsoforthehonorofmyvillageneighborhoodandourschool.Thecollegelifeiswonderful.Alllifeinschoolarefresh.Newteachers，newclassmatesandfreshfriendsarearoundme.I’vefelttheirfriendship，wideknowledgeandopeningmind.Thegrandlibrary，schoolbuildingsandwideplaygroundareveryattractingtome.Iamveryeagertolearnmuchknowledgequickly.Inhighschool，Iwasevercalledasarunnerbeforetime.Now，IknowIambehindtimesomuchinfact.Ihopetocatchupwiththetimebym