For example, it indicates the pressure distribution in some parts of Asia on a certain day in June 165438+ 10. Reading questions 3-4. 3. The weather condition in 3.Xi 'an is correctly described as ().

The wind direction at a specific point on the isobar chart is from high pressure to low pressure, and the northern hemisphere deflects to the right. Wind speed depends on the density of isobars. The isobar at a is relatively dense. If the weather system at a in the chart is strengthened, it is predicted that the wind direction and speed in Urumqi will change greatly within three days.

Therefore, choose: d.