在初三《中国地理》教材第九章“中国的交通”中 ,讲述公路的发展和分布时 ,限于篇幅和编写时间的原因 ,加上近几年公路发展迅速 ,教材内容显得少且陈旧 ,特作以下补充 :公路具有“公益”和“商品”两个属性 ,是国民经济赖以发展的重要基础设施 ,在国家的整个综合交通运输体系 In the third day of “Geography” teaching materials in Chapter IX “China’s traffic”, about the development and distribution of roads, limited to the length and preparation of the reasons for the time, coupled with the rapid development of roads in recent years, the teaching material appears to be less and outdated, Special supplement for the following: Highway with “public goods” and “two” attributes, is the national economy depends on the development of an important infrastructure in the country’s entire integrated transport system