《打不断的纸圈》先剪出两条长50厘米,宽2厘米的纸条,再把它们粘合成两个纸圈。请两位同学用小刀挑起纸圈,并在纸圈上搁一根细长的木条。这时,请你握一根较粗的木棒,迅速而大力地敲击木条的中间部分。结果是:木条被击成了两截,而挂在刀口上的纸圈却“安然无恙”!难道纸圈竟然会 The “endless paper loop” first cut two strips of paper 50 cm long and 2 cm wide and then bonded them into two paper loops. Please two students with a knife to pick up the paper ring, and put a slender wood in the paper ring. At this moment, please hold a thick stick and quickly and vigorously hit the middle part of the stick. The result is: Strips were hit into two parts, while hanging on the edge of the paper ring was “safe and sound”! Do not even the paper will be