写关于学英语的目的作文
更新时间:2025-05-25 20:48:21
专题:英语
郭益深回答:
belowaresomeideas:tolearnenglishistomasteraveryusefultool,withtheuseofthistool,youcanopenanewworldandlearnalotfromdifferentcountries,italsoenahnceyourcapabilitytocommunicatewithothersindifferentareasetc...
郭益深回答:
MouthX-RaysandtheBrain;InfectedGumsDoNotCauseHeartAttacksthisisthevoaspecialenglishhealthreport.anewstudysuggeststhatdentalx-raysmayincreasetheriskofthemostcommonkindofbraintumor.however,expertssaytheriskofthesemostlynon-cancerousgrowthsisstillverysmall.thestudyinvolvedaboutfourteenhundredpatientswithbraintumorscalledmeningiomas.theywerecomparedwithacontrolgroupwithoutbraintumors.apanoralexaminminnesotadr.elizabethclausofyaleuniversityinconnecticutledthestudy.shesaystherewasaclearrelationshipbetweendentalx-raysandthebraintumors.elizabethclaus:"wefoundthattheindividualsthatwerediagnosedwithmeningiomawereessentiallyabouttwiceaslikelytoreporthavingaspecifictypeofx-ray,whichisverycommon,abitewing."thelinkwasgreaterwithadifferentkindofimaging,calledapanoramicx-ray.therewasuptofivetimestherisk,dependingonageorhowoftenthex-raysweretaken.dr.clauspointsoutthatinthisstudy,thepeopleweregenerallyintheirfiftiesorolder.theywereaskedtorememberx-raystheymighthavehadmanyyearsearlier.elizabethclaus:"thereisalwayssomedifficultyinpeoplerememberingpastexposures.andsopatientscouldunder-orover-reporttheirdentalx-rays.andsoyoualwayshavetokeepthatinmind."dr.claussaysshedoesnotwanttoscarepeopleawayfromdentalvisits.elizabethclaus:"thebigtake-homemessageis,keepgoingtothedentist.buthaveaconversationwithyourdentistaboutwhetheryoumightbeabletoreducethenumberofx-raysthatyoureceive."herresearchpaperappearsintheamericancancersociety'sjournal,cancer.duringdentalprocedures,andevenwhenpeoplebrushtheirteeth,mouthbacteriaoftenenterthebloodsystem.apopularbeliefisthatgumdiseasecanleadtoheartattacks.butlastweek,circulation,ajournaloftheamericanheartassociation,publishedastatementsayingthereisnoscientificproof.thestatementsaysgumdiseasehasnotbeenproventocauseheartdiseaseorstroke.and,itsays,treatinggumdiseasehasnotbeenproventopreventthem.thereisalsonotenoughevidencetoknowwhetherbrushingandflossingregularlycanpreventheartdisease.acommitteeofheartdoctors,dentistsandinfectiousdiseasespecialistsconsideredfiveh