如图所示o为凸透镜的光心o1oo2为凸透镜的主光轴f为凸透镜的两个焦点用f表示透镜的焦距ab为物体ab的像ab箭头方�平行 Template




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tomski如图所示o为凸透镜的光心o1oo2为凸透镜的主光轴f为凸透镜的两个焦点用f表示透镜的焦距ab为物体ab的像ab箭头方�平行 coloring