Ma Xiao, a photography enthusiast, photographed the terraced landscape in a certain area of China (Figure A) and drew a local contour topographic map of the area (Figure B), which was completed accord

Ma Xiao, a photography enthusiast, photographed the terraced landscape in a certain area of China (Figure A) and drew a local contour topographic map of the area (Figure B), which was completed accordingly.

Question 1:B?

Question 2: A.

Test analysis:

Question 1: Reading the landscape map, the length of the farmer-plow-cow head is about 5 meters, and the length of the forward line in the farmer's map is about 20 meters. Considering the difference of sight distance, farmers' farmland is close to a right triangle, and the length of two right-angled sides will be greater than 30 meters, which is about 40 meters, so the farmland area is about 800 square meters =0.08 hectares. According to the materials, 1 m2 =0.000 1 hectare =0.00 15 mu, so 800 m2 =0.08 hectare =0.0008 km2 = 1.2 mu, so a, c and d are all wrong. B ok.

Question 2: Judging from the map, the elevation of A is about 800 meters, and the height difference between B and C is 0.5 meters, so the height difference between AC and AB is 4.5 meters, and the height difference between AD is 4.6 meters, which means that point D is the lowest, and the river flows from B to C and D. Judging from the direction marks on the map, it flows from northwest to southeast, and B and D are wrong. The illustrated area is located in the northern hemisphere, and the right bank is eroded, and the right bank is the west bank, so the west bank is seriously eroded and the east bank is seriously silted, and A is wrong with C.