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00:07:53
Virtual image | Geometric optics | Physics | Khan Academy
Landus Mumbere Expedito
2 意见
·
16 四月 2024
00:09:36
Convex lens examples | Geometric optics | Physics | Khan Academy
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29 行进 2024
00:08:19
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00:09:37
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29 行进 2024
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