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船是人类发展史上伟大的发明之一,可以用它渡河,出海抓鱼,运送货物,随着航海技术的发展,船可以航行得更远,用途更广.下面我们就一起来回顾轮船的发展历程.船的“前生”——浮具和筏人类的祖先在与水打交道的过程中,发现了木头、树枝和落叶能够漂浮在水面上的自然现象.特别是在发生洪水灾害时,一些人在绝望的挣扎中偶然抓到一根漂浮的断木而绝处逢生的事实,使人们逐步认
Ship is one of the great inventions in the history of human development, you can use it to cross the river, catch the fish, the delivery of goods, with the development of navigation technology, the ship can sail farther, more extensive use. Here we come together to review the development of ships History of the ship The “ancestors” of the ship - Floats and rafts The human ancestors discovered the natural phenomenon of wood, branches and fallen leaves floating on the surface of the water, especially in the event of a flood disaster , The fact that some people accidentally caught a floating woodcut in a desperate struggle,