[单选题]
The near point of a farsightwp,ul0 )yhm8e th0lrlv+w/ r t :j:*jted person is 100 7q twrrq96 j4.h3g)+chy sobmcm. She places reading glasses close to hej3g wsh6r479h)rtm .o+qqb cyr eyes, and with them she can comfortably read a newspaper at a distance of 25 cm. What lens power is required?
Post time 2024-1-26 22:03:25