[单选题]
A microscope has an objectixpj is jf a-z0( s+t*a0e-/d;uuzm)zrveltx 6.lj /nsoc3g3b)p lens of focal length 1.4 mm and an eyepiece of focal length 20 mm, adjustgj.tll3b) xsno p36/c ed for minimum eyestrain. A blood sample is placed 1.5 mm from the objective. What is the overall magnification?
