一、切不破的纸首先把土豆或苹果放在桌子上,再将纸对折起来,把折痕对准刀刃裹住刀。然后用裹着纸的刀刃去切土豆或苹果、黄瓜等,结果奇迹出现了:用裹着纸的刀切开了土豆、黄瓜、苹果后,纸却完好无损。为什么呢? 原来,这是由于你用裹着纸的刀切土豆、黄瓜和苹果时,刀刃对纸、土豆、黄瓜和苹果产生压力的同时,土豆、黄瓜和苹果反过来也对纸和刀产生压力。又因为土豆、黄瓜和苹果的质地比纸的纤维松软,当刀刃对纸的压力还没有 First, the unbreakable paper First, the potatoes or apples on the table, and then fold the paper up, fold the knife at the knife edge alignment knife. And then cut the paper with a knife to cut potatoes or apples, cucumbers, the results miracles appeared: with a knife wrapped in paper cut potatoes, cucumber, apple, the paper is intact. Why? Originally, it was due to the pressure on paper, potatoes, cucumbers and apples when cutting potatoes, cucumbers and apples with paper knives, while potatoes, cucumbers and apples in turn produced paper and knives pressure. And because the texture of potatoes, cucumbers and apples is softer than that of paper, when the pressure on the paper by the blade is not yet