Weather history in Xining

(1) gradually decreases, and the terrain gradually increases from east to west.

(2) The temperature difference between day and night is large, the terrain fluctuates greatly (the weather is changeable), and the vegetation presents a vertical distribution law.

(3) AB

(4) big. Resource status, level of scientific and technological development, degree of regional opening to the outside world, human cultural level (human activities such as industry and agriculture, urbanization level, etc.). )

(5) Advantages: abundant sunshine, abundant water energy, diverse mineral species, unique wildlife resources and rich tourism resources; Disadvantages: insufficient heat and fragile ecological environment.

This topic investigates the comprehensive analysis of various regions in China.

(1) accumulated temperature is the sum of all the values greater than or equal to 10 degrees in a year in an area, which is used to reflect the heat level. It can be directly judged by the contour of accumulated temperature in the map, and the reason can be analyzed by combining the topographic difference between the middle east and the west.

(2) "The climate of the ancient city is always impermanent" mainly reflects the great local climate change and the large temperature difference between day and night. "Snow on Baihua Mountain under the Mountain" reflects the obvious vertical zonality differentiation in mountainous areas, and "Worrying about rainstorm every day and frost at night" reflects the great changes in the weather.

(3) Pay attention to natural factors. The main natural conditions affecting the formation and development of cities are analyzed from climate, topography, rivers and other factors;

(4) Calculation method of growth rate: the number before the change is subtracted from the number after the change, and then divided by the number before the change. From 1990 to 2000, the population growth rate of Shandong Province was 0.076, and that of Qinghai Province was 0. 16. The main factors affecting population capacity are analyzed from the aspects of science and technology, resources and regional development degree.

(5) The main factors affecting economic development can be analyzed from the aspects of climate, topography, soil, water, natural resources and biology, and attention should be paid to distinguishing favorable conditions from unfavorable conditions.