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imagined a selfdriving car that would work in water. GM (通用汽車公司 ) created a concept that would run on an updated6 version of the Chevrolet Volt39。s annual design challenge, car panies were asked to predict the highway patrol1 vehicle of 2025. As The New York Times reports, several of the concepts were autonomous2 , designed either to be pletely unmanned or to help officers monitor3 the area. BMW3