The picture shows the "National Maximum Temperature Forecast Map". Complete the problem 17 ~ 18. 17. Describe the reasons for the high temperature weather in two areas in the picture. What is correct is that

A, the quasi-static front of the Yangtze River and Huaihe River —— from mid-June to early July, affecting the Yangtze River basin, and the illustration time is around July 25th, which does not conform to the meaning of the question; ?

B, the time in the picture is around July 25th, and it is unlikely that cold air will go south to Fuzhou, which does not meet the meaning of the question;

C, in summer and autumn, typhoons can alleviate the high temperature and heat in Fuzhou and Hangzhou, so it is correct;

D, the movement of the direct point of the sun is regular, so it does not meet the meaning of the question.

So choose: C.