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发表于2024-11-23
Eli Whitney pdf epub mobi txt 電子書 下載 2024
True or false? Eli Whitney invented the cotton gin, a machine for removing seeds from cotton. False Eli Whitney was the first person to build a wire-toothed cotton gin. But Eli's gin was not the first machine of its kind. He made nails to earn money when he was a boy. He went to court to protect his wire-toothed cotton gin when others tried to build similar machines. He started his own musket-making business.
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Eli Whitney pdf epub mobi txt 電子書 下載 2024