Study on green utilization efficiency of land resources in China 封面英文题名：Study on green utilization efficiency of land resources in China。 Study on the allocation efficiency of sports resources in China Study on green efficiency of water resources in China 并列题名：Study on the allocation efficiency of sports resources in China Expansion and utilization efficiency of urban industrial land in China 并列题名：Expansion and utilization efficiency of urban industrial land in China Grain trade and sustainable utilization of cultivated land resorces in China Study on efficient utilization of clean coal in China Case study on the disputes of land and resources in China