[单选题]
A microscope has an objectivem.+na hh88jwm wesr m5.g0)j a lens of focal lecbo02 2y6h vka 5dy4;8mxc jmwngth 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 objective. What is th46xb2woh;yd0av2 c c 5jymm8 ke overall magnification?
Post time 2024-1-26 22:03:25