[单选题]
A microscope has an objective lens of focal imyro:h5px 4j .2e:q/lc t7 bd5thqf-: j1uwplength 1.4 mm and an eyepiece of focal length 20 mm, adjusted for minimum eyestrain. A blood sample is placed 1.5 mm from the obh w:uj -pf1q5tjective. What is the overall magnification?
Post time 2024-1-26 22:03:25