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31-扎不漏的水袋
32-将粉末与水分开
33-透明手指头
34-让鸡蛋浮起来
35-鸡蛋立正
36-变色的苹果
37-筷子大力士
38-调皮的纸团
39-飞檐走壁
40-海底火山
41-非牛顿流体
42-操控气球
43-检测食物中的淀粉
44-简易指南针
45-磁悬浮
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