DHoldingacellphoneagainstyourearorstoringitinyourpocketmaybedangeroustoyourhealth.Thisexplainsawarningthatcellphonemanufacturersincludeinthesmallprintthatisoftenignoredwhenanewphoneispurchased.Apple
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Holdingacellphoneagainstyourearorstoringitinyourpocketmaybedangeroustoyourhealth.Thisexplainsawarningthatcellphonemanufacturersincludeinthesmallprintthatisoftenignoredwhenanewphoneispurchased.Appleforexampledoesn’twantiPhonestocomeclosertoyouthan1.5centimeters;ResearchInMotionBlackBerry’smanufacturerrecommends2.5centimeters.
Ifhealthissuesarisefromcellphoneusethepossibleeffectsarehuge.Voicecalls-Americanschatoncellphones2.26trillion(万亿)minutesannually-earn$109billionforthewirelesscarriers.
DevraDavisanexpertwhohasworkedfortheUniversityofPittsburghhaspublishedabookaboutcellphoneradiation“Disconnect.”Thebooksurveysscientificresearchandconcludesthequestionisnotsettled.
BraincancerisaconcernthatMs.Davisexamines.Overalltherehasnotbeenanincreaseinitsincidencesincecellphonesarrived.Buttheaveragemasksanincreaseinbraincancerinthe20-to-29agegroupandadropfortheolderpopulation.
“Mostcancershavemultiplecauses”shesaysbutshepointstolaboratoryresearchthatsuggestslow-energyradiationcoulddamagecellsthatcouldpossiblyleadtocancer.
ChildrenaremorevulnerabletoradiationthanadultsMs.Davisandotherscientistspointout.Radiationthatpenetratesonlyfivecentimetersintothebrainofanadultwillreachmuchdeeperintothebrainsofchildrenbecausetheirskullsarethinnerandtheirbrainscontainmoreabsorptivefluid（易吸收的液体）.Nostudieshaveyetbeencompletedoncellphoneradiationandchildrenshesays.
HenryLaiaresearchprofessorinthebioengineeringdepartmentattheUniversityofWashingtonbeganlaboratoryradiationstudiesin1980andfoundthatratsexposedtoradiationhaddamagedDNAintheirbrains.
Ms.Davisrecommendsusingwiredheadsetsorthephone’sspeaker.Childrenshouldtextratherthancallshesaidandpregnantwomenshouldkeepphonesawayfromtheabdomen（腹部）.
【小题1】Whyisthewarninginthesmallprint?
A．Theythinkpeoplewillnotcareaboutit.B．Thereisnotenoughspaceforthewarning.C．Theydon’twanttheuserstopayattentiontoit.