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A．传输层B．数据链路层C．物理层D．网络层
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听力原文： Thomas Jefferson was a statesman, an author, and an architect. He was tutored privately until he entered the College of William and Mary. In 1773, Jefferson married Martha Wayles Skelton and settled with his bride at Monticello, the mountaintop home which he had designed himself and whose construction was to extend over 50 years. Jefferson served in the House of Burgesses, Virginia' s parliament, until it ceased to function in 1775. Not a gifted public speaker, he was most talented as a literary draftsman. His most important contribution to the revolutionary cause before 1776 was his Summary View of the Rights of British America, composed for the Virginia Convention of 1774. In 1775, he was elected to the committee to draft a declaration of independence from England. In 1779, Jefferson was elected governor of the state of Virginia. Having served as vice-president in John Adams' administration, Jefferson ran for president in the election of 1800. the most outstanding accomplishment of his administration was the purchase of Louisiana Territory from France in 1803. Upon his death in 1826, Jefferson was buried under a stone which described him as he had wished to be remembered: as the author of the Declaration of independence and the Virginia Statute for Religious Freedom and the father of University of Virginia.
From which college did Jefferson graduate？
下列有关收益率的理解不正确的一项是()。
《物业管理条例》是()颁布。
面向对象方法学的出发点和基本原则是尽可能模拟人类习惯的思维方式，分析、设计和实现一个软件系统的方法和过程，尽可能接近于人类认识世界解决问题的方法和过程。因此面向对象方法有许多特征，如软件系统是由对象组成的；(50)；对象彼此之间仅能通过传递消息互相联系；层次结构的继承。
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