[单选题]
A microscope has an ).t1vu e;n pw)mbi:xi objective lc9.yz vdr:k d;ens of focal length 1.4 mm and an eyepiece of focal length 20 mm, adjusted for minimum eyestrain. A blood sample is placed 1.5 mm z;dk:9y .rvcd from the objective. What is the overall magnification?
Post time 2024-1-26 22:03:25