本题目来源于试卷: Physics Unit25: Optical Instruments，类别为 国际高中通用物理
[单选题]
The near point of a farsighted person is 100 cm. She places readil1d3ga: w7 pd,nm(inh ng glassesyyd9 us7y+h8 /2j -nk i8srlfs1y/j ii close to her eyes, and with them she can comfortably read a newspaper at a distance of 25 cm. What lens power is n +s-yl7 idi/hiy/ jsufr8ykjs219y8 required?
A. +2.5 D
B. +3.0 D
C. +3.2 D
D. -2.0 D
参考答案: B
本题详细解析:
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