(26 points) Complete the following questions according to the relevant materials: Take a photo of the materials. (1) Point out the distribution characteristics of accumulated temperature in the illust

(26 points) Complete the following questions according to the relevant materials: Take a photo of the materials. (1) Point out the distribution characteristics of accumulated temperature in the illustrated area, and analyze the reasons. (4 points)

(1) The accumulated temperature gradually decreases from east to west, because the terrain gradually increases from east to west (4 points).

(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 (6 points).

(3) Location factor: located in the valley terrain; River water supply; Political center; Traffic arteries; Military town (6 points)

Development and change: the Qinghai-Tibet Railway was opened to traffic; Further development of surrounding tourism resources, etc. (2 points)

(4) Big (2 points)

Advantages: abundant sunshine, abundant water energy, diverse minerals, unique wildlife and rich tourism resources (4 points)

Disadvantages: insufficient heat, fragile ecological environment, backward transportation and high population pressure (2 points)

Test analysis:

According to the distribution of the isoaccumulative temperature line in the figure, we can see that the accumulative temperature decreases from east to west. The farther west, the higher the terrain, and the west is the Qinghai-Tibet Plateau in China.

According to "clothes must be worn every day in four seasons", it can be judged that the temperature difference between day and night is large, and according to "snow on Baihua Mountain", the vertical belt differentiation law of vegetation in this area can be judged, indicating that the terrain fluctuates greatly.

According to the introduction of the materials, it can be seen that Xining has an important traffic position and is a military town. According to the map analysis, Xining is located in the valley area, with abundant water and high temperature. In recent years, the opening of the Qinghai-Tibet Railway has promoted the development of its resources and tourism.

The population growth rate can be directly calculated: Shandong: (9079-8439)/8439×100%; Qinghai: (518-446)/446×100%; Qinghai is located in the Qinghai-Tibet Plateau, with high altitude, poor heat conditions, fragile ecological environment and inconvenient transportation, which are all restrictive factors. The favorable conditions are rich mineral resources (Qaidam basin is called cornucopia); Rich in water resources; High altitude, sunny day and plenty of sunshine; Wild animals and plants are unique and rich in tourism resources (such as Bird Island in Qinghai Lake).