Water cycle in the 24 solar terms

(1) According to the water cycle and arrow, a stands for seawater evaporation; B stands for water vapor transport from the ocean to the land; C stands for precipitation on land; Surface runoff returns to the ocean.

(2) According to the analysis of the above problems, the water vapor formed by evaporation in the ocean finally returns to the ocean through surface runoff in the D link, so it occurs between the ocean and the land, which is a big cycle between the land and the ocean, making the water resources on the land constantly updated and replenished.

(3) The production and life of human beings are mainly concentrated on the surface, and the most influential link of human activities is to affect the surface runoff environment by affecting rivers and lakes, building reservoirs and transferring water across basins. The South-to-North Water Transfer Project changes the spatial distribution of water by changing the surface runoff, and the main link of its influence is the surface runoff. The construction of reservoirs can change the temporal distribution of water resources, and the inter-basin water transfer can change the spatial distribution of water resources. China's summer monsoon is a southeast monsoon blowing from the ocean to the land, which will bring abundance.

So the answer is:

(1) evaporation? Water vapor transport? Precipitation surface runoff

(2) the sea-land cycle? Ocean? Land? land

(3) reservoir d b