(1) Looking at the map, we can see that the three places of ABC, from A to B to C, are farther and farther away from the sea, and are less and less affected by the ocean, so the annual temperature range is gradually increasing, while the annual precipitation is decreasing.

(2) Area F is the Qinghai-Tibet Plateau, with an average elevation of more than 4,000 meters, and the temperature decreases with the elevation. Due to the influence of topography, in the same season, the temperature in the Qinghai-Tibet Plateau is lower than that in the middle and lower reaches of the Yangtze River at the same latitude.

(3) Zhenjiang, Jiangsu Province is located in the eastern monsoon region south of Qinling-Huaihe River in China, with a typical subtropical monsoon climate. Its most prominent feature (as shown in Figure D) is that the average temperature in Leng Yue is above 0℃ in winter, and it is hot and rainy in summer, which is often said that the rain and heat are in the same period and the four seasons are distinct.

(4) It is credible that Italy is located in the Mediterranean climate zone, and it is mild and rainy in winter, so it is rainy in winter, so floods occur in winter.

(5) Because Chinese mainland has a vast territory, the western part extends to the interior of Asia, and the climate of China has obvious continental characteristics, mainly manifested in the annual and daily variations of temperature. Compared with other regions in the same latitude in the world, the temperature in winter is obviously low and the temperature in summer is high. "Wearing leather clothes in the morning and wearing gauze in the afternoon to eat watermelon around the stove" is a concrete manifestation of the large daily temperature difference in Xinjiang.

(6) There is a great difference between north and south in winter in China. It's warm in the south, and the farther north, the lower the temperature. When you go to Harbin to see the ice lanterns, you should take your winter clothes and keep warm.

So the answer is: (1) The land and sea positions are different; (2) Topographic factors; (3)D； It is hot and rainy in summer and mild and rainy in winter; (4) credibility; Italy is located in the Mediterranean climate zone, and it is rainy in winter, so there will be floods in winter; (5) The daily temperature difference is large; (6) Take winter clothes and keep warm.