Twitter / diyism (1) 手持放大镜的虚像倍数=1+25cm/焦距cm,比如6倍放大就是5cm焦距 |
| 手持放大镜的虚像倍数=1+25cm/焦距cm,比如6倍放大就是5cm焦距 Posted: 20 Jan 2013 07:22 AM PST 手持放大镜的虚像倍数=1+25cm/焦距cm,比如6倍放大就是5cm焦距 |
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