如图1是边长为1的六个小正方形组成的图形，它可以围成图2的正方体，则图1中小正方形顶点A，B围成的正方体上的距离是____ ．

在“观察水的沸腾的实验”中，小明的实验记录表格如下：

①开放带来进步，封闭导致落后。重回以邻为壑的老路，不仅无法摆脱自身危机和衰退，而且会影响他国经济发展，导致“双输”局面。

②随着“悟空”号暗物质探测卫星的发射、贵州世界最大射电望远镜的投入使用、“墨子”号量子卫星的升空，神秘的宇宙世界将会变得泾渭分明，不再神秘。

③这座建筑密度极低的城市；垂柳袅袅，花香阵阵；置身于这柳暗花明的静谧中，立感远离了尘世的喧嚣。

④进入黄山，古木参天，云雾缭绕，极目远眺，翠竹林海，群山起伏，一直延伸到与蓝天相接处，顿时你会产生一种歧路亡羊的感觉。

⑤党员干部要与群众心灵相通，需走近群众，从“握手”开始，步步为营，消除心与心之间“最后一公里”的隔阂，这样才是一个合格的党员干部。

⑥尽管东亚区域经济合作仍在向前发展，但“一体化”势头明显受阻，东亚各种组织机制叠床架屋却缺少主导和方向，多边安全机制的建立也毫无进展。

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    Where do you go when you want to learn something? A friend? A tutor? These are all 1places of learning. But it may well be that the learning you really want 2somewhere else instead. I had the3 of seeing this first hand on a 4.

    My daughter plays on a recreational soccer team. They did well this season and so5 a tournament, which normally was only for more skilled club teams. This led to some6experiences on Saturday as they played against teams 7 trained. Through the first two games, her8 did not get one serious shot on goal. As a parent, I9 seeing my daughter playing her best, 10still defeated.

    It seemed that something clicked with the 11 between Saturday and Sunday. When they 12for their Sunday game, they were 13 different. They had begun to integrate (融合) the kinds of play and teamwork they had 14the day before into their15 . They played aggressively and 16scored a goal.

    It 17me that playing against the other team was a great 18 moment for all the girls on the team. I think it is a general principle. 19is the best teacher. The lessons they learned may not be20what they would have gotten in school, but are certainly more personal and meaningful, because they had to work them out on their own.