TV213.2 2001031644流域问题的本质与长江流域的适度开发=Essenceof basin problems and the appropr亏ate exploitationof the ehangjiang Rive:Valley/周运清,熊瑛//长江流域资源与环境一2001,10(1)一28一33参6(宋金叶)HNF127 2001031645长江三角洲与珠江三角洲经济发展特征比较二ComParisons on the development of eeonomybetween the Changjiang and Zhujiang deltas/王益澄//长江流域资源与环境一