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为什么有的雪是“棉花糖”，有的却是“硬冰糖”#涨知识 #有趣 #解压
1. Invent yourselfA self-starting siphon can be made using a piece of rigid tubing bent into a specific shape. When thesiphon is partially immersed in water, it begins siphoning water without the need for initial suction.Investigate how the relevant param
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