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Q星期天在惠山泉游玩时,看见许多游客往泉水里扔硬币,但令我惊奇的是,有的游客却能让硬币奇迹般地浮在泉水的表面上而不沉下去,这是什么原因?(无锡文燕)
Q When I was playing in the Huishan Spring on Sunday, I saw many tourists tossing coins into the spring water. However, what surprises me is that some tourists miraculously float the coins on the surface of the spring without sinking. What is the reason? (Wuxi Wen Yan)