The weather systems that cause drought in North China are () A, cyclone B, quasi-static front C, warm front D and high pressure.

Test center: geography common sense topic: analysis: when the cold front crosses the border, there are often strong winds, cloudy days, precipitation and cooling weather; After crossing the border, the temperature and humidity decreased, the air pressure increased and the weather turned fine; When the warm front crosses the border, it often appears cloudy, rainy and other weather; After crossing the border, the temperature rose, the air pressure dropped and the weather turned fine. Upward airflow prevails in the cyclone center, and it is rainy, so A is incorrect. Controlled by quasi-static front, it will form rainy weather, so B is incorrect; When the warm front crosses the border, it will form continuous precipitation, so C is incorrect; Downflow prevails in the high-pressure center, controlled by it, the weather is sunny and dry, and D is correct. Therefore, choose: D. Comments: This topic investigates the weather system that affects China and belongs to the basic topic.