The following figure is a schematic diagram of the weather system on a certain day in summer in China. A, B, C and D are four cities under the control of this weather system. The air pressure in the a

The following figure is a schematic diagram of the weather system on a certain day in summer in China. A, B, C and D are four cities under the control of this weather system. The air pressure in the armor is 99.

Question 1:A

Question 1:B

This topic studies weather systems. The front and the pressure center combine to form a frontal cyclone, that is, a front is formed at the trough of low pressure, so Figure A is consistent.

Question 2: Combined with the above picture, A is located in the center of low pressure, with prevailing updraft and rainy weather; A strong updraft in a city is conducive to airflow diffusion, so the air quality is better. Combined with the movement of the front, it is judged that C is south; City C is located on the side of the heating air mass, and the weather is sunny, while city D is located on the side of the cold air mass, which belongs to a rainy area, so the daily temperature difference in sunny days in city C is larger than that in city D.