7:A
8. A northwest-flood, the northwest is the driest area in China, so it is impossible to have a lot of precipitation, impossible.
C There is no spring drought in South China, but there should be one in North China.
D There is no summer drought in North China, only in South China.
So choose b, it is possible. The northeast is near the sea, and the collision between warm and humid air and cold air in the southeast is easy to form heavy rainfall.
9:A
10:C
1 1:D
12:B
13: The color of the C satellite cloud image is beneficial to earthquake relief, so it means that the satellite can clearly photograph the ground, so as long as there is no cloud cover, it is the best, then the color of the ground photographed by the satellite is the color of the satellite cloud image beneficial to earthquake relief, and the vegetation in the earthquake zone is lush, so-green is correct.
14:A
15: In June 2008, there was a La Nina phenomenon, and the temperature in the equatorial eastern Pacific was low, so the temperature in the western Pacific was higher than that in the eastern Pacific.
16:D The main coal mining area in China is in the north, so it is transported from the north to the south.
17:D
18:B