(2) abundant labor force, convenient transportation, long production history, broad market and scientific and technological support (only answer two items)
(3) Traffic refrigeration and preservation? (4) a? b？ D(3 points)
Test and analysis: (1) The natural conditions affecting agricultural production can be analyzed from the aspects of climate, topography, soil, water source, etc., and attention should be paid to regional reality. (2) The socio-economic conditions that affect agricultural production mainly include market, transportation, science and technology, policies and labor. (3) Vegetables have a short shelf life, so the development of transportation and refrigeration technology should be considered in their long-distance sales. (4) Agricultural development should be combined with ecological agriculture, organic agriculture, science and technology, economic benefits and environmental protection.
Comments: This question is less difficult. Students only need to master the basic situation of the main natural conditions and socio-economic conditions that affect agricultural production, analyze the actual situation of regional agricultural production in China, pay attention to the direction of agricultural sustainable development, and combine the analysis of agricultural sustainable development measures in the United States.