EPISODE · May 27, 2022 · 4 MIN
蜜桃姐姐讲故事_2089_怎样撬起一头狮子
from 蜜桃姐姐讲故事
怎样为一头狮子称重量呢？用一台又大又笨、叮叮当当响的大机器吗？用这样的机器确实可行，不过还有更加简单的方法，那就是简单机械:杠杆、轮轴和滑轮。这些机械可以让工作变得更加容易。今日谜语：嘴儿尖尖个儿长，经常出没在操场，说它是枪没枪膛，手儿一松就飞翔。 （打一体育器械）
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蜜桃姐姐讲故事_2089_怎样撬起一头狮子
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