The rate and magnitude of urbanization in comparison to the capacity of the land to absorb the expansion can have bearing on the resultant urban morphology and hence the availability of plantable spaces 随著急剧的都市发展，城市的发展速度规模和潜在土地拓展空间对都市面貌及绿化区构成重大影向。完善的现代都市计划总会预留空间作种植之用。
2.
Chapter three combines the facts in chinese information industry with the theory to analyze comparative advantages by use of the statistics and diagrams . chapter four puts forward some important means to stimulate the development of information industry in china effectively in the light of the factors analyzed in the last chapter . chapter five indicates two significant questions which have bearing on the development of chinese information industry 根据软件产业的特性和我国的国情，着重发展软件产业；根据产业链中不同阶段的不同要求，着重发展我国在加工贸易中的比较优势；根据提高电子信息产品产业内贸易的要求，合理安排产品层次，促进市场多元化；根据我国在信息产业发展进程中起步晚的现实，充分发挥“后发优势” ，积极发展信息产业。
