Analyze the weather system map of a place in the northern hemisphere, and answer: (9 points) (1) Fronts: Fronts (cold front, warm front) formed near A and B (2 ...

(1) cold front (2) northwest? Southwest? (3) The isobars at the big A are dense, and the horizontal pressure gradient force is large.

(4) Anti-cyclone (high pressure) sunny (5) A Ding

Test analysis: (1) Judging directly from the front view, there is a cold front between Party A and Party B; There is a warm front between Ding and Bing. (2) According to the isobar distribution shown in the figure, the wind direction is oblique to the isobar, pointing from high pressure to low pressure, so the wind direction of A and B can be drawn, and the northwest wind is in A; There is southwest wind at B. (3) From the density of isobar in the figure, the isobar at A is greater than that at B, that is, the horizontal pressure gradient force is greater, that is, the wind force is greater. (4) The isobar at C is closed, and the central air pressure is higher than the surrounding area, so it is judged as a high-pressure center, and downward flow prevails, so the weather is fine. (5) According to the fact that the precipitation formed by the front is distributed on one side of the cold air mass, the precipitation of the cold front is located behind the front first. The warm front precipitation is distributed in front of the front.

Comments: This question is generally difficult, suitable for the basic test of senior one, and has certain comprehensiveness. To solve the problem, we need to grasp the following points: ① The wind direction can be drawn according to the distribution of isobars; (2) according to the density of isobar to reflect the size of the wind; ③ Judging the high and low pressure center according to the central air pressure and the difference around it, and judging the weather situation in combination with the vertical airflow movement.