本题目来源于试卷: Physics Unit25: Optical Instrument，类别为 Generic Physics
[单选题]
The near point of a farsi :ga 8ms gq4)q1p8k4ydc5xo:l1a qdnigh1wy1hh i2kwzv s18d6c ted person is 100 cm. She places reading glasses close to her eyes, and with them she can comfortably read a newspaper at a distance of 25 cm. What lens power is reqyvs wh6 21hwck1zi d81uired?
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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Post time 2024-1-26 22:03:25