搜索 - 科创

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最后是锶，密度： 2.6 熔点： 769 沸点： 1384 这次用了几个3Wled做辅助光源，拍摄效果有所改善，锶的活动性比较差，还不如锂、、、、 Sr~~~~~~~~ 这是反映后，反应时，只是...

接下来讨论对称欧拉陀螺的情形的一般情况。由定义，此时只可能是一个轴转动惯量与2轴转动惯量相等。由（4.19）应取该轴为1轴。即\(I_1=I_2\)。那么由（4.28），k=0，sn、cn、dn函数分...

呵呵，楼主可真是“厚颜无耻”啊。哈哈~开玩笑。希望楼主不要介意。[s:274] [s:274] [s:274] 这都能参加比赛那么我这几个呢？虽然自己觉得还可以，但是拍的不怎么好，不敢发上来。。。今...

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