Traditional Culture Encyclopedia - Weather inquiry - Qilu Evening News 2012124 February: Affected by strong cold air, a large-scale cooling and snowfall weather process began to appear in Shandong Province on the 25th.

Qilu Evening News 2012124 February: Affected by strong cold air, a large-scale cooling and snowfall weather process began to appear in Shandong Province on the 25th.

Cold wave is the main disastrous weather affecting China in winter, which refers to a large-scale strong cold air activity. Specifically, within 24 hours, the temperature in the middle and lower reaches of the Yangtze River and its north area drops above 10℃, and the lowest temperature is below 5℃, accompanied by strong winds of 5-7 on land and 6-8 on the sea, which can be regarded as a cold wave. The cold wave moves south, causing sharp cooling, frost and strong wind in the passing area.

Therefore, choose: d.