Among the following four schematic diagrams of weather systems, what causes the unique "drought" weather in the middle and lower reaches of the Yangtze River are:

D

Test question analysis: The latent drought affecting the Yangtze River Basin in my country is due to the influence of subtropical high pressure, prevailing downdrafts, high temperatures and little rain; and A The picture shows rising airflow prevailing in the vertical direction, which is judged to be a low-pressure center; the horizontal airflow in Picture B is convergent, and is judged to be a low-pressure center; Picture C is a front; the horizontal airflow in Picture D is divergent, and the wind direction is deflected to the right, so it is judged to be the Northern Hemisphere Illustration of a high pressure center.

Comments: The difficulty of this question is average. Students only need to master the common celestial system types that affect the formation of special weather in local areas of my country, and judge the weather system based on the airflow movement characteristics shown in the options. Pay attention to the relationship between the air pressure distribution and the direction of horizontal and vertical air flow movement.