The following table shows the weather conditions in Changsha from June, 20 13 to February, 20 18. According to the materials, complete questions 9 ~ 10. The time is13&; ...

A. According to the data analysis in the table in the title, under the influence of this weather system, there has been cooling and rainy weather. After the weather system transited, the temperature dropped and the weather turned fine, so it was the weather formed by a cold front. A in the figure is a low-pressure system, so it does not meet the meaning of the topic;

B. According to the data analysis in the table in the title, under the influence of this weather system, there has been cooling and rainy weather. After the weather system transited, the temperature dropped and the weather turned fine, so it was the weather formed by a cold front. Figure b is a cold front, so it's right;

C. According to the data analysis in the table in the title, under the influence of this weather system, there has been cooling and rainy weather. After the weather system transited, the temperature dropped and the weather turned fine, so it was the weather formed by a cold front. C is a high-voltage system, so it does not meet the meaning of the topic;

D.D. is the data analysis in the warm front table. Under the influence of this weather system, there has been cooling and rainy weather. After the weather system transited, the temperature dropped and the weather turned fine, so the cold front affected the weather, so it didn't meet the question.

Therefore, choose: B.