1. The largest mountain range in the picture is () A. North and South B. East and West C. Northwest-Southeast D. Northeast-Southwest 2. In this weather,

1. The answer is B. There are two rivers in the picture. The river north of 25 degrees north latitude flows north, and the river south of 25 degrees north latitude flows south. This shows that there is a mountain range along the 25-degree north latitude line, which has become a watershed for rivers on both sides of the strait. Because the mountains extend along the latitude, their trend is east-west

2. The answer is D. According to the distribution law of isobar in the figure (the convex height is low), it can be judged that the local area is controlled by a low-pressure trough, and the trough line is basically consistent with 25 degrees north latitude. There should be a front along the trough line, which is a cold front, with a cold air mass in the north and a warm air mass in the south. The moving direction of the front is from north to south, and the precipitation area is located on one side of the cold air mass.

Option A: A is located on the windward slope (as mentioned above, the local front is a cold front, and the air movement direction is from north to south), and it is in the precipitation area, so the precipitation probability is high. So a is wrong.

About option B: B is located on the leeward slope, and the probability of precipitation is small. So b is wrong.

About option C: The northerly wind blows at C, which is located on the side of the cold air mass and the temperature is low. So c is wrong.

About option d: the horizontal pressure gradient force of the ground points to the northeast and is biased to the right by the geostrophic force. Considering the influence of friction, the wind is inclined to the isobar, which is a westerly wind. Dingdi is also located on the side of the heating group, and it is partly cloudy and sunny. So d is correct.