Two kinds of special weather affecting the middle and lower reaches of the Yangtze River in China are () A. Meiyu B. Sandstorm C. Typhoon D.V..

A. In early summer, it often rains continuously in Jianghuai area. The morning, evening, duration and rainfall of plum rain will affect agricultural production in Jianghuai area. Therefore, a meets the meaning of the question;

B, due to the scarcity of vegetation, more sandy soil and frequent cold wave and windy weather in the north and northwest of China, sandstorms are prone to occur in relatively dry spring. Therefore, b does not meet the meaning of the question;

C, mainly affecting China's southeast coastal provinces such as Hainan, Guangdong, Guangxi, Taiwan Province, Fujian and Zhejiang. The typhoons that hit our country mostly occurred in May 5- 10/0, especially in July-August. So c does not meet the meaning of the question;

D. Drought can happen all the year round. Spring drought occurs in vast areas in the north, coastal areas of South China and southwest China, especially in North China. Early summer drought occurred in the north; Summer drought mainly occurs in the south of Qinling-Huaihe River; Autumn drought mainly occurs in Hunan, Hubei, Jiangxi and Anhui provinces; Winter drought mainly occurs in South China, so D fits the question.

Therefore: ad.