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MGSM / 李过去完成 400 米跨栏能比杰拉尔德完成 400 米跨栏快 2 秒,但是杰拉尔德改变了饮食习惯,从而使速度提高了 10%。如果李以 38 秒完成 400 米跨…

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李过去完成 400 米跨栏能比杰拉尔德完成 400 米跨栏快 2 秒,但是杰拉尔德改变了饮食习惯,从而使速度提高了 10%。如果李以 38 秒完成 400 米跨栏,则杰拉尔德改善饮食习惯后完成 400 米跨栏需要多少秒?

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