According to the query of 12 question bank, the concept of surface integral of coordinates is derived from _? First, changing force to do work; B, the quality of the bending member; C, the quality of curved surface components; The answer to "D, the flow rate of stable field fluid" is D, so we can know that the concept of surface integral of coordinates is introduced through the flow rate of stable field fluid.

Surface integral is one of the important concepts and calculation tools in advanced mathematics, engineering mathematics, physics, mechanics and electricity.