下午,我做完作业,邻居家的小强央求我给他做风车,我答应了。我首先找来材料,一张正方形硬纸,一把剪刀,一枚大头针,一根长长的小木棍。开始做了,我用剪刀把纸剪出四个小孔,形成一个“X”形,再把四个角向中心一叠,然后用大头针从纸的四个角重叠处穿过去,插在木棍的顶端。这样,一架小风车就做好了。“小强,你去试一试。”小强举着风车使劲跑,但风车就是不转。这是怎么回事呢?我拿过来认真地检查,发现大头针插进木 In the afternoon, I finished my homework and my neighbor’s Xiaoqiang begged me to give him a windmill. I agreed. I first got the material, a square cardboard, a pair of scissors, a pin, a long wooden stick. When I started, I cut the paper out of the four holes with scissors to form an “X” shape, then folded the four corners to the center and then used a pin to pass through the overlap of the four corners of the paper At the top of the wooden stick. In this way, a small windmill is done. “Xiaoqiang, you go to try. ” Small forced a strong windmill to run, but the windmill is not to turn. What happened? I took it carefully and found that the pin was inserted into the wood