many countries have passed safety laws that require seat belts in vehicles阅读理解答案

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1、Manycountrieshavepassedsafetylawsthatrequireseatbeltsinvehicles阅读理解答案　　Manycountrieshavepassedsafetylawsthatrequireseatbeltsinvehicles.Amodernthree-pointseatbelt,alsocalledasafetybelt,isaharnesstopreventthedriverorapassengerfromflyingforwardandhittinghardagainsttheinteriorofavehicledur

2、ingacollision.Amodernseatbeltwillhelptopositionyouproperlytogainmaximumbenefitfromyourcar’sairbagsthatwillinflate（使充气）duringacollision.Usingaseatbeltalsopreventsyoufrombeingejected(弹出)fromacarintothepathofoncomingtraffic.Researchshowsthatwhenyouwearamodernseatbelt,youreducetheriskofdea

3、thorseriousinjuryby70%ormoreduringanautoaccident.　　Seatbeltshaveexistedindifferentformssincetheearlydaysofautomobiles,andtheyhavechangedfromasinglelapbelttothethree-pointseatbeltweusetoday.In1911thefirstairplaneseatbeltwasinstalled.Then,inthe1920’stheywereusedinracecars.Bythe1930s,agro

4、upofAmericanphysicianscreatedlapbeltsfortheirownvehiclesandurgedvehiclemanufacturerstoprovideseatbeltsonallvehicles.　　Dr.C.HunterSheldenmadeamajorcontributiontooursafetywithhisarticleintheNovember5,1955JournaloftheAmericanMedicalAssociation(JAMA).Hestronglyencouragedthemanufactureandus

5、eofdoorlocks,airbags,andretractable(伸缩式的)seatbelts,liketheonesweusetoday.Themodernthree-pointseatbelt,includingalapbeltandashoulderbelt,wasintroducedasstandardequipmentonVolvocarsin1959.　　In1970,thestateofVictoriainAustraliamadethewearingofaseatbeltcompulsoryforeverycardriverandfront-s

6、eatpassenger.Todaymanycountrieshavealsomandated(授权)theuseoffive-pointsafetyharnessesforcarefullydesignedchildsafetyseatsthatcanprotectachildduringaseriouscaraccident.　　AnairbagisaSupplementalRestraintSystem,orSRS,andconsistsofarapidlyinflatablerestraintcushionthatworkstogetherwithaseat

7、belttoprotectyouduringacollision.Moderncarsoftencontainseveralairbagsinvariouslocations.Sinceairbagscanonlyinflateonceandwillquicklydeflateaftertheinitialimpact,theywillnotprovideanyprotectionforyouduringasecondarycollision.　　Theinflationofairbagcanprotectorhurtyou.Theriskzoneforadri