Bernard@cari
2013-9-22 11:04 PM
2010年选择题no.4
若d是一凸透镜的实物与实像的最小间距，那么实物与凸透镜间的距离是多少？
若d是一凸透镜的实物与实像的最小间距，那么实物与凸透镜间的距离是多少？
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