有讲得好的.有一个MIT教授讲大学物理课的视频,很多人看了对物理的兴趣从无到有

来源: 野生动物摄影家于 2014-02-25 10:39:24 [博客] [旧帖] [给我悄悄话] 本文已被阅读：次

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