In this paper,the mechanism of the influence of temperature onthermal conductivity of cast iron and the temperature dependence of thermal con-ductivity of different cast irons are minutely summarised.

Maybe,it can offer some essential reference for further research on temperature dependence of autogenous shrinkage of HSC/HPC.

This paper discusses the reasons causing high dependence on foreign trade of China from principal structure, foreign trade ways and industry structure respectively and provides corresponding measures.

In order to study the relationship between economic development and dependence of agricultural mechanization on financial investment,this paper analyzes the dependence of agricultural mechanization on financial investment according to the cross-sectional data of each province across China.

According to this situation and to the dependence of national economy on mineral resources, the present paper deals with position and role of minerl resources in the national economy and makes a suggestion of "vigorously develop mining industry by science and technology and strengthen administration".

Econometric analysis on the dependence degree of china s import trade;

In the recent yeras,because of the ascendant of foreign trade dependence degree, some problems and risks have been visible.

Based on the analysis of the formulating feature about these strategies, theories of the dependence degree of city economy & human resource development and bi-directional filtrating model are put forward.