This is a schematic diagram of the near-surface weather model of an area in the northern hemisphere. Read and answer questions 22-24. Question1:wind direction at m a. southwest wind b. west.

Question 1:C

Question 1:B

This topic studies weather systems and weather.

Question 1: Isobar is combined with frontal surface, so it is judged as frontal cyclone, and the central air pressure is low, so the wind direction is inclined to the right in the northern hemisphere, and it crosses isobar according to the direction of horizontal pressure gradient force.

Question 2: If a warm front is formed at the trough of low pressure, then M is located in front of the warm front, which is a rainy area, and N is located behind the warm front, controlled by the warm air mass, and the weather is fine.

Question 3: As shown in the figure, when the warm front crosses N, the temperature rises obviously.