Read the picture and answer the following questions. (1) The agricultural region types corresponding to A, B, and C in the figure are ______ (fill in the serial number). Small scale. ①Mix

(1) Combining the illustrated positions of A, B, and C, it can be seen that A is the commercial grain agricultural area, B is the monsoon paddy agricultural area, and C is the mixed agricultural area.

(2) B is the monsoon paddy field agricultural area. The location advantage of developing monsoon paddy field agriculture here is obvious, which is mainly reflected in the superior natural conditions, large population, and people like to eat rice.

(3) Since location A is commercial grain agriculture, this type of agricultural geographical type is mainly distributed in the northeast and northwest regions with vast land and sparsely populated areas in our country; similarly, countries that develop this type of agricultural production are also It should have the conditions of vast territory and sparsely populated areas.

(4) From the diagram, we can see that A is the Central Plains of the United States. The agriculture here has the characteristics of large-scale production, high commodity rate, and high level of mechanization.

(5) The natural conditions for the development of commercial grain agriculture in the United States are very favorable, as shown in the following: flat terrain, fertile soil, sufficient water sources, suitable climate, and rain and heat at the same time.

(6) The United States’ developed industry and advanced technology provide machinery and technical support for agriculture.

So the answer is:

(1)②③①

(2) Flat terrain; dense population, large demand for food; abundant labor resources; rain and heat at the same time ;Cultivation has a long history. Small farmer operation, low commodity rate.

(3) Northwest, Northeast, the United States, Canada, Argentina, Russia, Ukraine and other countries.

(4) The central plains of the United States have large production scale, high mechanization level, and high commodity rate

(5) The terrain is flat and vast, the soil is deep, the fertile water is abundant, the climate is mild, and precipitation is high. Rain and heat in the same period

(6)②④