7、极大地提高人们的生活质量。1.Onceputtouse,theSafetyTruck________.A.willbeveryexpensiveB.willonlybesoldinArgentinaC.cangreatlyreducecaraccidentsD.canbethemostpopulartruckintheworld答案 C [细节理解题。根据文章第二段Thesystemsendsvideofootageinfrontofatrucktofourscreensonitsback.Itgivesdriver