跪谢.Someparentsthinkthattheirchildshouldbeallowedtousecellphones,formobilephonesarenotentirelyharmful.Tobeginwith,parentscaneasilykeepintouchwiththeirchildbycellphones.Meanwhile,ifchildhavesomeemergencysituation

　　跪谢.

　　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.