20 10 65438+ 10/7 A heavy snowfall occurred in northern Xinjiang, resulting in an avalanche at 9 locations in Guozigou, Xinjiang, the main trunk line of Lianhuo National Highway, with death 1 person a

20 10 65438+ 10/7 A heavy snowfall occurred in northern Xinjiang, resulting in an avalanche at 9 locations in Guozigou, Xinjiang, the main trunk line of Lianhuo National Highway, with death 1 person and local traffic paralysis.

Question 1:B

Question 2:C

This topic studies weather systems.

Item 1: The material reflects that the weather system affects the occurrence of heavy snowfall, and the occurrence time is 1 month; Therefore, it is judged as a cold front.

Choose picture B.

Question 2: the change process of air pressure before and after the cold front crosses the border: before the cold front crosses the border, it is controlled by the warm air mass, with higher temperature and higher air pressure.

Low; After the cold front passes, the cold air mass replaces the original warm air mass, so the temperature drops and the air pressure rises, so it is judged as a C curve.