The following table is the data table of weather conditions measured by Haimen Meteorological Observatory for several days. Read the table and complete questions 38 ~ 40. Date temperature (℃) pressure

The following table is the data table of weather conditions measured by Haimen Meteorological Observatory for several days. Read the table and complete questions 38 ~ 40. Date temperature (℃) pressure. A, according to the moving direction of cold and warm air mass, it can be judged that the picture is a schematic diagram of warm front, which does not conform to the meaning of the question;

B, according to the moving direction of the cold and warm air mass, it can be judged that the map is a schematic diagram of a cold front, so it is correct;

C, according to the direction of airflow, it can be judged that the picture is a high-pressure system in the southern hemisphere, so it does not meet the meaning of the question;

D, according to the direction of airflow, it can be judged that the map is a low-pressure system in the northern hemisphere, so it does not meet the meaning of the question.

So choose: B.