In the figure, the solid line is isobar, and the dotted lines M and N are frontal lines. Answer question 2 1-22 according to the picture: The weather system shown in the picture is () a. Frontal cyclo

In the figure, the solid line is isobar, and the dotted lines M and N are frontal lines. Answer question 2 1-22 according to the picture: The weather system shown in the picture is () a. Frontal cyclone B in the northern hemisphere. A, according to the front near the trough of low pressure, M and N are front lines, and it is judged that ⑤ is low pressure. According to the wind direction in the figure, it is judged that the horizontal airflow of the system moves counterclockwise, so it is a system in the northern hemisphere, so it is correct;

B, according to "there is a front near the trough of low pressure, judging from the wind direction in the figure that the horizontal airflow of the system moves counterclockwise", it is judged that the weather system is a low pressure (cyclone) in the northern hemisphere, which does not meet the meaning of the question;

C, according to "there is a front near the trough of low pressure, judging that the horizontal airflow of the system is counterclockwise by the wind direction in the figure", it is judged that the weather system is a low pressure (cyclone) in the northern hemisphere, which does not meet the meaning of the question;

D. According to "there is a front near the trough of low pressure, judging that the horizontal airflow of the system is counterclockwise by the wind direction in the figure", it is judged that the weather system is a low pressure (cyclone) in the northern hemisphere, which does not meet the meaning of the question.

So choose: a.