Solution? The magnification of the microscope = eyepiece × objective lens, the eyepiece remains unchanged, the objective lens from "10 ×" for "40 ×", the magnification of the microscope expanded by a factor of 4; the greater the magnification of the microscope, the field of view to see the number of cells is less. The magnification is expanded by 4 times, so the number of cells seen in the field of view is 1/4 of the original, so the number of cells that can be seen in the field of view is generally 2.
Select: A.