The most applicable place to use the above proverbs to predict future weather trends is (　) A, ① B, ② C, ③ D, ④

Test points: Air pressure system and weather frontal system and weather topics: Analysis: Mainly examined frontal cyclones. The proverb "The south wind blows to the end, the north wind returns the favor" refers to the passage of cold fronts, as shown in the dotted line in the figure. There are two troughs of a weather system in the mid-latitudes of the Northern Hemisphere. Northern Hemisphere cyclones flow counterclockwise from the surroundings to the center. A cold front forms on the trough line between ① and ②, and a warm front forms on the trough line between ③ and 4. The weather system described in the material is a cold front, and the weather system shown in the picture is a frontal cyclone in the Northern Hemisphere. The cyclone in the Northern Hemisphere flows counterclockwise from the surroundings to the center, and point 2 is about to be affected by the cold front. Therefore choose: B. Comments: This question is of moderate difficulty and is a knowledge question. The key to solving the question is to master the relevant knowledge of frontal cyclones.