搜索 - 科创

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有机合成事典最近找这个的电子版很费劲，之前kc的链接挂了，纸质版似乎已经绝版了，终于找到了于是挂在这里。是一个百科全书似的东西还不错。

声明：本人未接受过正规教育，文中所述很可能有与事实不符的情况，还请各位巨佬指教这还得从一道题目说起题目中的主角就是脉冲电离室。其原理就是接收电离辐射在空气中产生的带电粒子来检测。由于空气中的组分电离能...

前一段时间做的一道题目，感觉思维很精妙，发上来与大家共享题意简述：n个白点和n个黑点，如果异色点曼哈顿距离不超过C则黑向白连边，否则白向黑连边，同色点的连边方向自定，问最少和最多有多少个异色三度环。n...

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