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简述利用乐高积木搭建一台指南车,并尝试利用高中物理知识,探究指南车在直行和转弯时,车上小人指向始终不变的原因,从而揭示指南车的秘密.
Brief introduction Build a guide car with LEGO bricks and try to use the physics knowledge of high school to explore the reason why the guide car always points to the same direction when turning straight and cornering to reveal the secret of the guide car.