In the following sentences, the weather is described as follows: a. The seasons are like spring; B. cloudy with light rain; C. autumn is crisp; D. The weather is warm in winter and summer.

Test and analysis: Weather refers to the atmospheric conditions in a short time. It is always changing. Climate refers to the average weather situation in a place for many years, which generally does not change much. So b refers to the weather and ACD refers to the climate.

Comments: This question can also examine two characteristics of the weather: ① At the same time, the weather in different places is different; ② The weather in the same place at different times may be different. Color and weather of satellite cloud images: blue represents the ocean, green represents the land, and blue-green areas are all sunny; White is a cloudy and rainy area. The thicker the white layer, the greater the probability of rainfall. Wind direction, wind force and weather vane: ① Wind direction refers to the direction of the wind ② Wind force refers to the strength of the wind, which is expressed by the wind grade, with a wind of 1 ~ 12; ③ The wide end of the wind vane indicates the wind direction, and the arrow tail points to the wind direction, that is, the big head blows the small head ④ The wind tail is on the right side of the wind pole. Weather forecast: forecast sunny and rainy days, wind and rain, temperature, etc. Weather symbol. Air quality: understand the content of air quality; Understand the meaning of air quality; Understand the index, grade and status of air quality.