Caaarl, what did you do, why am I a celestial sphere made of silicon, magnesium and iron? The world is dead and now it's alive, again?Oh hey, how did you get up there.Caaaaarl, we are llamas with hats
Carl and Paul
Caaarl, what did you do, why am I a celestial sphere made of silicon, magnesium and iron? The world is dead and now it's alive, again?Oh hey, how did you get up there.Caaaaarl, we are llamas with hats
在西欧十几天中,作者参观了卢浮宫、凡尔赛宫、巴黎圣母院等历史建筑,感受历史与文化的厚重;体验威尼斯水乡与少女峰的自然风光;观察欧洲人松弛的生活态度与高文化素养,也注意到厕所不足、网络欠佳及治安问题。整体印象深刻。
昨晚碰到一个很有意思的数学题,并且十分罕见地做了出来。代数能力不错的朋友可以挑战一下。$$ a, b, c满足 a=ab+c; b=bc+a; c=ca+b$$要求这三个数的和 $a+b+c$ .暂停0.47223924秒进行思考。先注意到a=b=c=0为一组解,此时a+b+c=0;再注意到:为第二组解(剩下两组a, b, c交换位置即可)暂停0.22474239计算a+b+c的值。接下来分享人类