科技改变生活主题班会演示幻灯片

HowScienceHasChangedtheWorldWeLivein,1,Observationlife,Whatchangeshavemoderntechnologybroughttoourlife?,2,Clothesbecomemorecolorfulandbeautiful.,3,Cookinghasbecomemoresimpleandconvenient.,4,Changesinthefunctionofmobilephones,JustfortalkingCanbebothentertainmentandoffice,5,Thebirthofatelephone,Thephoneisprobablythemostfrequentlyusedtoolwehavetoday，Andwecanhardlyleaveit。So,Icanthelpwondering,howwasthetelephoneinvented?,6,Theemergenceofmobilephones,OnedayinApril1973,amanstandingonthestreetsofNewYork,tookoutawirelessphoneabouttwobigbricksize,andMadeaphonecall,attractedtheattentionofpassers-byhavestopped.ThispersonistheinventorofthecellphoneMartinCoop.HewasintheUnitedStates,afamoustechnologycompanyMotorolaasaengineeringandtechnicalpersonnel,7,Theconceptofmobilephonesappearedin40s.AtthattimetheUnitedStatesthelargesttelecommunicationscompany-Baerlaboratoryhasconductedresearch.In1946,theBaerlabmadethefirstmobilephoneinhumanhistory.Butbecauseitistoolarge,theresearcherscanonlyputitontheshelfinthelaboratory,andithasbeenforgottenbythepeople.,8,9,1973mobilephonehasbeenregisteredpatents,butuntil1985wasborninthefirstmodernmobilephone.Itisthepowerandantennaplacedinabox,theweightof3kg,veryheavyandinconvenient,theusershouldcarryitlikeabackpacktocarryittowalk,soitiscalledtheshoulderbackphone.,10,Moderncellphoneappearancewasbornin1987.Comparedwiththeshoulder,itismuchlighterandeasiertocarry.Nevertheless,itsweightisstillabout750grams,comparedtotodaysweighsonly60gramssmobilephone,itlikeabigbrick.Sincethen,thedevelopmentofmobilephoneshasbecomemoreandmorerapid.1991,thephoneweighsabout250gramsorso;atthefallof1996,avolumeof100cubiccentimeters,weight100gramsofmobilephonesappeared.Sincethenfurtherminiaturization,lightweight,In1999therewasaweightof60gramsorlessofacellphone.Thatistosay,acellphoneisnotmuchmoreheavythananegg.,11,我们人类的智慧,Inadditiontothequalityandvolumeismoreandmoresmall,modernmobilephoneismorelikeamultifunctionalSwissArmyknife.Inadditiontothemostbasiccallfeature,thenewcellphonecanalsobeusedtosendandreceivemessagesandshortmessages,youcansurftheInternet,playgames,takepictu