跪谢啊...改完还有加分
Someparentsthinkthattheirchildshouldbeallowedtousecellphones,formobilephonesarenotentirelyharmful.Tobeginwith,parentscaneasilykeepintouchwiththeirchildbycellphones.Meanwhile,ifchildhavesomeemergencysituations,theyalsocantelltheirfamilyquickly.Besides,asmartphonehaveagreatnumberofapplicationssuchaselectronicdictionary,electronicbookandsurfinginternet.Studentsalsocanusetheseapplicationtoimprovetheirlearningefficiency.
Nevertheless,therearemorereasonstosupportthatinstructorhavetherighttobanmoblephones.Aboveall,usingcellphonescandistractstudent’sstudy.Moststudentplaytheircellphonesduringclassratherthanlisteningclass,andtheyarealsocheatingintheirexamswithmobilephones.Thatisveryseriousproblem.Moreover,theradiationofcallphoneishugeisissuetochildren,anditcanaffectteenagerhealthseriously.Accordingtorecentreports,radiationcancauseDNAdamagebecausethedefensiveofteenagersisverylow.Especially,long-termexposurewouldinfluencementalfunctionandimprovechancestogetkindsofcancerandotherdiseases.Soweshouldmakestudentsbeawayfromcellphones.