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2017年中央一号文件把“增加农民收入、保障有效供给”作为主要目标。阅读下列材料,回答问题。材料一下图是我国某地区图,图中虚线为不同时期种植业分布北界。(1)比较图中①②两地地形特征的异同。(2)归纳图中河口以上河段径流量时空变化特点及其自然原因,并简述图示区域种植业分布的变化及主要原因。材料二中共的“三农”政策,是随着对社会主
In 2017, Central Document No. 1 puts “increasing peasants’ income and ensuring effective supply” as its main objectives. Read the following material and answer questions. The picture below is a map of a certain area in our country. The dotted line in the picture shows the northern boundary of the planting industry in different periods. (1) Compare the similarities and differences between the topographic features of the two places ① and ②. (2) To summarize the characteristics of temporal and spatial variation of runoff above the estuaries and its natural causes, and briefly describe the changes and main causes of crop distribution in the illustrated areas. Material II The CCP’s “Three Rurals” policy is followed along with the socialists