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22 分钟
掺了棉花的冰块竟然砸不碎?丘吉尔也干了!
这时我们回头来看,棉花作为一种常见的材料,基本没有抗压能力,但抗拉能力相当之强,一团棉花可以被拉成很长一条棉线而不断裂。既然如此,棉花和冰这两种材料的特点是否可以 互补 一下?
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