本文介绍了一些安装在交通工具上新型安全系统，它们的存在帮助司机驾驶车辆，避免碰撞，区分动、静物等，打打提高了驾车安全。但是司机仍然要谨慎驾驶，遵守交通规则。Drivingspeedshavelargelystabilized,andnowadays,safetyconcernsareimportantandreducingroadfatalitiestominimumisamust.So,automakersarefocusedonsafetysystemsmorethaneverbefore.Giventheemphasisonimprovingsafety,it'spossiblethatwell-knownphrasessuchas"livefastanddieyoung"maylosetheirmeaningasinnovativenewdevicesarebuiltintocarsandtrucksandotherthingsthatgo.Manyofthenewsafetysystemsthatarebeingaddedtohigh-endvehiclesarecomputer-assistedtechnologiesthattransfersomeofthevehicle'soperationstothevehicleitself,ratherthanrelyingonlyonthedriver'sdecision-makingskills.Forexample,predictivebrakeassistisanin-vehiclefeaturethatpreparesthevehicleforbrakingwhenitsbuilt-insensorsdetectapotentialobjectahead.Thepredictivebrakeassistbasicallyplacesthevehicle'sbrakingsystemonalert,whichhelpsthesystemtoslowdownthecarinaslittletimeandasshortadistanceaspossible.Otherin-vehiclesensorswilldetectmovingandstatic(静态的)objectsandwillevendifferentiate（区别）theobjectsbasedonsimplepatterns,suchasothervehiclesvs.aperson.What'smore,built-in,in-vehicle"activesystems,"i.e.,predictiveprecollision(可预测碰撞)systems,willprovidedriverswithadvancedetectionofpotentialcontactbetweenvehicles.Thesesystemscomputetherelativemovementoftheobjectsanddetectpossibledangerousintersections.Whattechnologicaldevelopmentshaveenabledinnovationslikepredictiveprecollisionsystems?Essentially,theseso-calledactivesystemsaretheresultofvehicle-to-vehicleandvehicle-to-infrastructurecommunications.Thesecommunicationlinksallowhighwaystoprovideavehicle'sownerswithservicessuchasrentingamovieduringthetrip,aswellasreducereactiondelayswhenmedicalcareisneededduetoacrash.Despitethesenewtechnologies,driverscannottakesafetyforgranted.Untilallvehiclesarefullyautomated,itisthedriversthemselveswhoareresponsibleforoperatingtheirvehiclesandobeyingtrafficlawsdesignedtokeeproadwayssecure.So,keepyoureyesontheroadandyourhandsonthesteeringwheel(方向盘).1.“PredictivePrecollision”candothefollowingthingsexcept_______________.A.brakethecarautomaticallyinaslittletimeaspossibleB.detectpotentialcontactbetweenvehiclesinadvanceC.computetherelativemovementoftheobjectsD.detectpossibledangerouscrossings2.WhichofthefollowingstatementsisNOTtrue?A.Advancedsafetysystemsmakedrivingapleasure.B.Automakerspaymoreattentiontosafetysystemthanbefore.C.Newadvancedtechnologymakesthevehicleoperationrelyonlyonthevehicleitself.D.Driversarestillexpectedtodrivecarefullydespitethebuilt-inadvancedsafetysystem.3.Thepurposeoftheauthorwritingthepassageisto___________________.A.urgepeopletodrivecarefullyandobeytrafficlawsB.tellpeoplehowtoensuretheirsafetyontheroadC.introducesomeinnovativesafetysystemrelatingtovehiclesD.predictwhatthevehiclewithnewsafetysystemswillbelike.4.Whichsectionofthemagazinedoesthispassageprobablycomefrom?A.EntertainmentB.SportsC.SocietyD.Science1—4ACCD1.A第六段可以得出答案。可预测碰撞系统会为司机提供两车可能发生碰撞提前预测。这些系统计算相对移动速度，发现可能发生危险的交叉路段。2.C由全文推断，先进的安全系统让驾车成为一种快乐；从第一段可知B是符合文章的；第十段可知，交通工具完全自动化以后，司机还是要对控制车辆负责，并遵守交通规则，所以C不符合文章；3.C本文的写作目的就是介绍一些创新的交通工具上的安全系统。4.D本文既然介绍一种新型的交通安全系统，那就应该出现在一本杂志的科学板块部分。
