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下图表示并排放置的两个相等的正方形。第二 …
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这里有两组火柴棒。分别由9根火柴棒和10 …
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这是一个用火柴棒拼成六角形公寓。通过移动 …
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- 446 views
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下图是一个用12根火柴棒拼成的正方形。请 …
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