AfterhavingmorethanafewacquaintancesonlineitmightcomeablowtokeensocialnetworkerslikeBarackObamaorevenFacebookfounderMarkZuckerberghimself.Accordingtoaresearchtheaveragepersonhasinfacttwiceasmanyonli

　　AfterhavingmorethanafewacquaintancesonlineitmightcomeablowtokeensocialnetworkerslikeBarackObamaorevenFacebookfounderMarkZuckerberghimself.

　　Accordingtoaresearchtheaveragepersonhasinfacttwiceasmanyonlinefriendsasphysicalones.Usersofsocial-networkingsiteshaveonaverage121onlinefriendsascomparedwithphysicalones.Thestudyalsoclaimsthatpeopletendtobemoreopenconfidentandhonestwiththeirvirtualfriendsthantheir“real”ones.

　　“FormostpeopletheInternetisawayofkeepingintouchwithlovedonesandfriendsbutforpeoplewhoareisolatedduetoillnessitplaysamorevitalroleandcanoftenactasalifeline.”saysHelenOxleyapsychologistatWythenshawehospital.

　　“PeoplewithillnessesoftenrelyontheInternettofacilitate（促进）friendshipssincetheyblogandusenetworkingsitesasawayofdealingwiththeirillness.Itcanfosterasenseofsocialconnectionforthosewhofrequentlyfeelisolatedwhichisimportanttopsychologicalwell-being.”

　　Inwidersocietythewaysinwhichfriendshipsareformedarechangingwithpeoplerecognizingthattheycandevelopdeepandmeaningfulconnectionswithothersthatthey’venevermetandmaynevermeet.Aboutonein10peoplehaseithermettheirbestfriendsonlineorbelievestheycanmakelifelongfriendsontheWeb.

　　Thefindingshighlighthowsocialintroductionsarealsochanging.Onlyfivepercentwouldaskforsomeone’sphonenumberwhile23percentarenowlikelytoaskforanemailaddressorafullnamewiththeintentionofaddingthepersontotheirsocialnetwork.

　　Atthesametimehoweveraquestionnairecompletedby4427suggeststhat20percentofparentsbelievetheirchildren’seducationisaffectedbysurfingtheNet.Theythinktheirchildrenaredoingpoorlyattheschoolduetotheamountoftimetheyspendonnon-educationalwebsites.

　　28.Theunderlinedword“it”inPara1mostprobablyrefersto________.

　　A.peoplespendingtoomuchtimesurfingtheNet

　　B.peoplerelyingontheInternettoconnectwithfriends

　　C.peoplehavingmorevirtualfriendsthanrealones

　　D.peoplemakingmeaningfulconnectionswithstrangers

　　29.Wecaninferfromthetextthat________.

　　A.