Through surveying the causes of sandy desertification and its development, we think that the natural basis of sandy desertification is climate changes, landforms, features...

 
  • 总结了沙漠化对农牧业、交通、水利、通信以及人类健康等的危害,提出防治坝上地区沙漠化的对策建议。
今日热词
目录 附录 查词历史