本题目来源于试卷: Physics Unit25: Optical Instrument,类别为 Generic Physics
[单选题]
If the human eyeballs;wilu4v(4qizdn gqa0m9dwhm 99 +4d9 rso59nsp t-a is too short from front to back, this gives rise to a vision defect that can be corrected by ur- ptas9so59n sing
A. convex meniscus eyeglasses.
B. concave meniscus eyeglasses.
C. cylindrical eyeglasses.
D. contact lenses, but no ordinary lenses.
E. shaded glasses (i.e., something that will cause the iris to dilate more).
参考答案: A
本题详细解析:
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