【单选题】【消耗次数:1】
与汽车燃油经济性无关的因素是_________。
汽车质量
传动系传动比
发动机排量
行驶里程
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【单选题】 确定汽车传动系的最大传动比时,需要考虑()。
①  汽车的最大爬坡度、最低稳定车速和附着率
②  汽车的最大爬坡度、最高车速和附着率
③  汽车的最大爬坡度、最低稳定车速和最高车速
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