"High temperature and drought" was the main weather feature in Jiangnan area of China last summer. According to this, answer the questions with pictures. Question 1: What caused the high temperature a

"High temperature and drought" was the main weather feature in Jiangnan area of China last summer. According to this, answer the questions with pictures. Question 1: What caused the high temperature and drought in this area?

Question 1:B

Question 2:C

Test analysis:

Question 1: The weather systems that cause high temperature and drought in southern China are high pressure and anticyclone, which correspond to ② weather system.

Question 2: When the cold front crosses the border, the air pressure rises and the temperature and humidity drop sharply, which corresponds to the weather system.

Comments: This question is less difficult. The key to solve this problem is to find out the changing process of weather phenomena when each weather system transits. As shown in the above figure, ① it is a low-pressure cyclone, and its transit cloud thickens, which mostly leads to rainy weather; ④ Warm front, often cloudy, rainy and other weather phenomena. After the warm front crossed the border, the warm air mass replaced the original cold air mass, so the temperature rose, the air pressure dropped and the weather turned fine. It's not difficult to answer questions if you master the laws of these phenomena.