The article explains the reasons for the shortage of the carbon fibre supply, discusses the upsurge of the carbon fibre production capacity expansion caused by the contradiction between supply and demand, analyzes the easing of the supply and demand in the near future and presents the countermeasure for the development of China's carbon fibre and composites industry.

In recent ten years(1997-2006),the imbalance situation of water distribution between North and south of china further aggravate,the contradiction between supply and demand increases sharply,the proportion of water for industry,agriculture and life changes,both the proportion of industrial and civil water demanding increases annually,as the proportion of agricultural water gradually decreased.

The contradiction between supply and demand of human resources in the frontier-minority regions of China is obvious,which characterizes itself in the following:(1)the quality and quantity of human resources here cannot meet the sustainable development of socio-economy;(2) unbalanced supply and demand of human resources between different areas still exist.

The paper analyses the present and future resource state about steel scrap and that the contradiction of demand and supply will exist for a long time and puts forward five suggestions.

It reveals that contradiction of demand and supply is currently the key issue of forestry in china.

The producing area,contradiction of demand and supply,structure of import market of China\'s natural rubber from 1998 to 2007 are empirically analyzed.

Analysis on the conflict between supply and demand for the system of water purification in GZIS and countermeasure;

The outcome of investigation to Laifeng county show that,the conflict between supply and demand of secondary vocational education in west folk region in China is obvious,and the reasons are: the developing motivation of regional economy is insufficient,secondary vocational education don t adapt to the development level of regional economy.