[单选题]
A magnifying lens ha k*7ldy:hd5a x*mu (jx c2i6mns9u: wmsc0:lkfq)+l.c my 0jgs a focal length of 10 cm. A person has a near point of 25 cm. What is the magnification of the ley0s0ck+9uq.lwc l fmjsmg ::)ns for that person when their eyes are focused at infinity?
Post time 2024-1-26 22:03:25