[单选题]
A compound microscope haqyo4vv .y d5s psvjov )y47*scinf464s an objective with a focal le2 1fgosh5 1nzongth of 3.00 mm and an eyepiece of focal length 6.hg 1onos 5f21z00 cm. If the two lenses are separated by 40.0 cm, what is the total magnification?
