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 y 6kk /vjmv-u7d k2p.upv qzzj* rpd*+bg b1.,)yjm5qjlaces reading glasses close to her eyes, and with them syg*15+,qj vqbjz zbpdm *.j)rhe can comfortably read a newspaper at a distance of 25 cm. What lens power is 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:
暂无
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