研究生英语精读李敦之等主编,第二册,第七单元课后解答.ppt

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1、Week12-13Unit7CellphoneRadiationMayAlterYourBrainEvaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile5.2.0.0.Copyright2004-2011AsposePtyLtd.1Lead-inExercisesPassageStudyWritingPracticeEvaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile5.2.0.0.Copyright2004-

2、2011AsposePtyLtd.2Theme-BasedDiscussionLead-inBackgroundInformationEvaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile5.2.0.0.Copyright2004-2011AsposePtyLtd.31.WhatisCellPhoneRadiation?cellphonesemitradiofrequencies(“RF”),atypeofnon-ionizing（非电离）electromagneticenergy

3、thatfallsbetweenFMradiowavesandmicrowavesonthespectrum.ItisnotlikeanX-ray,butmorelikeaverylow-poweredmicrowaveoven."Whatmicrowaveradiationdoesinmostsimplistictermsissimilartowhathappenstofoodinmicrowaves,essentiallycookingthebrain,"Evaluationonly.CreatedwithAspose.Slidesfor.NET

4、3.5ClientProfile5.2.0.0.Copyright2004-2011AsposePtyLtd.4Theageofthepersonusingthephone;Whethertheuserisusingspeakermodeorahandsfreedevice;Thestrengthofthecellphonesignalatthetimeofuse;Theamountofcellphonetrafficatthetimeofuse;andThemodelofphoneused.2.Factorsdeterminingcellphone

5、radiationEvaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile5.2.0.0.Copyright2004-2011AsposePtyLtd.5glioma;（神经胶质瘤）acousticneuroma;（听神经瘤）meningioma;（脑膜瘤）ortumorsofthesalivaryglands（涎腺肿瘤）;CellPhoneRadiationwithCancerAndTumorsEvaluationonly.CreatedwithAspose.Slidesfor.N

6、ET3.5ClientProfile5.2.0.0.Copyright2004-2011AsposePtyLtd.6CellphoneRadiationtoChildrenChildren’sskullsandscalpsarethinner.Sotheradiationcanpenetratedeeperintothebrainofchildrenandyoungadults.Theircellsareatadividingfasterrate,sotheimpactofradiationcanbemuchlarger.Evaluationonly

7、.CreatedwithAspose.Slidesfor.NET3.5ClientProfile5.2.0.0.Copyright2004-2011AsposePtyLtd.7TipstoReduceCellphoneRadiationExposureBUYALOW-RADIATIONPHONEUSEAHEADSETORSPEAKERLISTENMORE,TALKLESSHOLDPHONEAWAYFROMYOURBODYCHOOSETEXTINGOVERTALKINGPOORSIGNAL?STAYOFFTHEPHONELIMITCHILDREN’SP

8、HONEUSESKIPTHE“RADIATIONSHIELD”（辐射防护屏）Evaluationonly.C