The picture below shows the air quality statistics of Beijing on June 20 13. Look at the picture and answer the following questions. Question 1: The air quality is often high after a windy day.

The picture below shows the air quality statistics of Beijing on June 20 13. Look at the picture and answer the following questions. Question 1: The air quality is often high after a windy day.

Question 1:A?

Question 2: B?

Question 3:C

Test analysis:

The problem 1: A is cold front weather, and the cold front transit is accompanied by windy weather, which blows away polluted gases and improves air quality. If there is more precipitation, the air quality will be better. A right. B is a warm front. When the warm front crosses the border, there is generally no windy weather, the warm air is weak, and there is often rainy weather. B is wrong. C is a cyclone, and there is usually stormy weather when crossing the border. As can be seen from the figure, the airflow of cyclone activity circulates in a small range, which will not obviously improve the air quality. C is wrong. D is an anticyclone, and downdraft prevails. Pollution gas is not easy to diffuse, air quality is poor, and D is wrong.

Question 2: On polluted days, the atmospheric humidity is not necessarily low, such as smog weather. A is wrong. There are many dust and impurities in the polluted air, and the water vapor content is generally large. At night, the atmospheric reverse radiation is strong. B. The convection in the polluted sky and atmosphere is weak, and inversion often occurs. The daily temperature difference is small, and C is wrong. The polluting gas in air pollution is not carbon dioxide, but carbon dioxide is a greenhouse gas. D is wrong.

Question 3: Beijing is surrounded by Hebei province, and the cement factory is moved to Hebei province. The polluted gas emitted by cement plants will still affect the air quality in Beijing. A is wrong. Electroplating enterprises are mainly water pollution. Strictly controlling the development of electroplating enterprises has little effect on solving air pollution. B is wrong. Increasing the proportion of electric vehicles can reduce automobile exhaust emissions, thus reducing air pollution. Hydropower must be in an area rich in hydropower, with little precipitation, small river flow and small gap in the suburbs of Beijing, which is not suitable for expanding hydropower generation.