Weather ground analysis

(1) high (Mongolia high)? Sunny and low temperature

(2)C The temperature rises, the air pressure drops, and the weather turns fine.

(3)②? Isobars are dense, a

(1) high (Mongolia high)? Sunny and low temperature

(2)C The temperature rises, the air pressure drops, and the weather turns fine.

(3)②? Isobars are dense, and the horizontal pressure gradient force is large.

(4) Cold wave sandstorm

⑸C

Test analysis:

At (1)A, the central air pressure is high, and the surrounding air pressure is low and high. Due to the sinking of the central airflow, the weather is clear and the temperature is low.

(2)a is a ridge of high pressure, so it is impossible to form a front. B and c are both located in the low pressure tank. The air masses on both sides of C are cold air masses moving from high latitude to low latitude, so they are cold fronts. The air masses on both sides of B are warm fronts, because the warm air masses at low latitudes move to the cold air masses at high latitudes. After crossing the border, affected by the warm air mass, the weather is characterized by rising temperature, falling air pressure and sunny weather.

(3) The isobar at ② is the densest and the pressure gradient force is the largest, so the wind speed is the largest.

(4) In winter and spring, under the influence of this weather system, northwest wind blows in northwest and north China, which will lead to strong wind cooling and cold wave weather. In addition, due to the dry climate in winter and spring, the surface material is loose, which will also form sandstorm weather.

(5) Northeast China is affected by frontal cyclone, with rainy weather; The wind direction in Tarim basin is from high pressure to low pressure, and the northeast wind is formed to the right; The wind direction in North China Plain is from high pressure to low pressure, and the right deviation forms southeast wind. However, the eastern part of the Inner Mongolia Plateau is affected by frontal cyclones, with rainy weather. So choose C.