Read the schematic diagram of four different weather systems in a certain place before and after the transit, and complete question 3 1-32: 3 1. The correct judgment about the four weather systems is

Read the schematic diagram of four different weather systems in a certain place before and after the transit, and complete question 3 1-32: 3 1. The correct judgment about the four weather systems is ( A and A are cyclones, and the cold wave is formed by the influence of cold front, which does not conform to the meaning of the question;

B and B are anticyclones, and the dry weather in the Yangtze River basin in summer is influenced by subtropical high, so it is correct.

C and C are cold fronts, and the typhoon is a tropical cyclone, which does not meet the meaning of the question;

D and D are warm fronts, and the rainstorm weather in northern China in summer is caused by cold fronts.

Therefore, choose: B.