据中国汽车工业协会的统计分析，今年上半年我国汽车生产总量在低速增长的大格局下，不同品牌间存在较大的差异，大体分为三类：一、中型客车、大型客车、重型载客货车、轻型载货车快速增长，销售量增长速度在27％至74％之间。中客和大客的增长主要是由于高速公路的发展，因为 According to the statistical analysis of the China Association of Automobile Manufacturers, under the large pattern of low-speed growth in China’s total auto production in the first half of this year, there are major differences among different brands, which can be broadly divided into three categories: 1. Medium-sized passenger cars, large passenger cars, heavy-duty trucks Passenger vans and light trucks have grown rapidly, with sales growth rates ranging from 27% to 74%. The growth of Chinese passengers and big customers is mainly due to the development of expressways because