Израиль нанес удар по Ирану09:28
We're all familiar with the high-pitched squeak of basketball shoes on the court during games, or tires squealing on pavement. Scientists conducted several experiments and discovered that the geometry of the sneakers' tread patterns determines the squeak's frequency, enabling the team to make rubber blocks set to specific frequencies and slide them across glass surfaces to play Star Wars' "Imperial March."
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今年以来，聚焦要素市场建设重点领域和关键环节，粤港澳大湾区内地九市、重庆等10个要素市场化配置综合改革试点地区主动作为，着力破除体制机制障碍，充分释放要素市场活力。