The author analyzes and states the situation text and the background text,states that the non-language text plays an very important role for the choice of the reasonable type of writing.

Summarize of environmental background and Meteorological in Lanzhou;

A study on environmental background of East Asian land cover using digital terrain models;

In order to indicate the effect of the environmental background of a drainage basin and human activity on the river's water quality,TM and SPOT images,thematic maps,statistic data and in field measured data were used to analyze the relationship of Jilong River water quality with its environmental background and urban pollution.

Effects of sea-water intrusion in Laizhou Bay on agricultural soil and water environments are discussed on the basis of analyzing environmental setting and conditions of seawater intrusion,and combining the fieldwork and collecting data,it has caused water resources deterioration and short supply of fresh water source area.

Dynamic Change of Chinese Farmland and Environment Background Analysis;

With RS and GIS supported,the authors analyse features of soil erosion environment background in these hilly areas,then some points are suggested for controlling soil erosion.

With Rs and GIS supported,this paper analyses features of soil erosion environment background in these hill areas,then we suggest some points for treating soil erosion.