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[托福阅读TPO] 托福阅读TPO29(试题+答案+译文)第3篇:The History of Waterpo
【1】Moving water was one of the earliest energy sources to be harnessed to reduce the workload of people and animals. No one knows exactly when the waterwheel was invented2014-10-23 编辑:alice
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Filename: libraries/Cache_file.php
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2014-10-23 编辑:alice