Proportion of sexual subsidies, grain, cotton and oil price subsidies, agricultural product purchase price index, agricultural means of production price index and total agricultural product imports to total imports (%); Other policies: agricultural tax, the proportion of rural non-agricultural labor force to social employees (%), and the average secondary school education or above per 100 workers. Three. Calculation of correlation coefficient between agricultural policy variables and their strategic objectives
With the rapid development of China's construction industry, more and more building materials are applied to the construction of construction projects. The f