单项选择题
A.阅读帽B.物镜帽C.目镜后眼镜D.放大镜
A.聚散B.非调焦C.调焦D.非聚散
A.+3.00DB.+3.75DC.+3.50DD.+3.25D
A.+2.00DB.+2.75DC.+2.50DD.+2.25D
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