A geographical problem about the weather system

1 B and d are obviously incorrect, so rule them out first.

2. A. The altitude map on the right side of the answer shows that the air pressure at 5, 6 and 7 places exceeds 10 km. According to geographical knowledge, the mid-latitude troposphere thickness is about 10 km. Also, the region is in the middle latitude (near the British Isles), and it is unlikely that there will be a troposphere above 10 km in this region. So rule out the a answer. Only C answer is more in line with the actual situation.

3. As can be seen from the stem, the distance from 3 to 6 isobars is uniform, indicating that the air pressure changes evenly. On the contrary, the distance between the isobar outside the 6-site and the 6-isobar is obviously increased. Obviously, this place will have a relatively large upward slope, and six places should be inflection points.

In answer a, the air pressure changes obviously at 2-4, slows down slightly at 5-6, and there are inflection points at 4. In answer C, the pressure changes at 3, 4, 5 and 6 are uniform, and there is an inflection point at 6. Obviously, only the C answer meets the analysis results of the above six inflection points, so choose the C answer.