综合类教程汇总和更新

　　Air Transportation　　Airplanes are used to carry passengers, cargo and mail. Air transport companies operate sc... [查看全文]

　　The Open University in Britain　　1 In 1963 the leader of the Labour Party made a speech explaining plans fo... [查看全文]

　　Geology and Health　　The importance of particular metals in the human diet has been realized within the past... [查看全文]

　　Living History at Jamestown Settlement　　A woman in Native American clothes is sitting in the sun, sewing a ... [查看全文]

　　When a magazine for high-school students asked its readers what life would be like in twenty years, they sai... [查看全文]

　　My mother knew how to knit, but she never taught me. She assumed, as did many women of her generation, tha... [查看全文]

　　When it comes to singling out those who have made a difference in all our lives, you cannot overlook Henry... [查看全文]

　　The industrial age has been the only period of human history in which most people's work has taken the ... [查看全文]

　　The Ford motor company’s abandonment of electric cars effectively signals the end of the road for the t... [查看全文]

　　第一篇　　Common-cold Sense　　You can't beat it, but you don't have to join it. Maybe it got the name... [查看全文]