The weather is getting worse.

( 1)B？ A

(2)b？ a

(3)B

(4) Low temperature, high air pressure and fine weather; Strong winds and rainy days; The temperature rises, the air pressur

( 1)B？ A

(2)b？ a

(3)B

(4) Low temperature, high air pressure and fine weather; Strong winds and rainy days; The temperature rises, the air pressure drops, and the weather turns fine.

(5)B？ A

Test analysis:

Problem (1), the cold air mass in Figure A retreats and is judged as a warm front; In Figure B, the cold air mass took the initiative to attack, so it was judged as a cold front.

Problem (2), the cold air mass is distributed under the front because of its high density. The density of warm air mass is small, so it is distributed on the front. Question (3), the winter cold wave in China belongs to the weather affected by cold front.

Problem (4), after the warm front crosses the border, the warm air mass replaces the cold air mass, so the temperature rises, the air pressure decreases and the weather turns fine; The rain area is located on one side of the cold air mass and in front of the front.

Problem (5): The precipitation intensity of cold front B is larger, and the precipitation duration of warm front A is longer.

Comments: This problem is less difficult, and the key to solve it is to master the basic judgment method of frontal weather map and the weather change process before and after frontal transit. The answer to this question needs to be clear: (1) The cold air mass retreated to the warm front weather map; The cold air mass attack is a cold front weather map. (2) The cold air mass is always under the front, and the warm air mass is always on the front. (3) The weather condition of warm front crossing is continuous rainfall; After crossing the border, the warm air mass replaced the cold air mass, so the temperature rose, the air pressure dropped and the weather turned fine. (4) The cold and warm front rain area is always on one side of the cold air mass, and the front or rear position of the rain area can be judged according to the moving direction of the front.