试题与答案

焦点至透镜的距离是()A、物距 B、焦距 C、像距 D、物体至照相机的距离

题型:单项选择题

题目:

焦点至透镜的距离是()

A、物距

B、焦距

C、像距

D、物体至照相机的距离

答案:

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