GeorgeStephensonwasb的精选

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任务型阅读。GeorgeStephensonwasbornin1781inapoorfamily.Hehadt...

任务型阅读。GeorgeStephensonwasbornin1781inapoorfamily.Hehadt...

2019-12-30
问题详情：任务型阅读。GeorgeStephensonwasbornin1781inapoorfamily.Hehadtostartworkwhenhewasonlyeight.Attheageoffourteen,hebecamehisfather’shelper.Ittookhimalotoftimelearningaboutengines(发动机).Andonhol...