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[PBS访谈社会系列] PBS高端访谈:汽车制造商和汽车购买者是如何回应油价下跌的?
GWEN IFILL: One year ago, when automakers held their big show in Detroit, a gallon of gas went for an average of $3.31. Now, as the auto show gets under way again, it's dropped by a third, all t..2015-01-13 编辑:max