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本书收集了史蒂芬·霍金在牛津、剑桥等大学或学术机构的学术会议上的七次讲话。内容包括理论天体物理的各个方面,宇宙的形成和灭亡,黑洞的理论、天体物理等有关学说。...
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本书针对托福写作考试所考查的技能,全面介绍了各专项题型,分析各题型特点,提供实用高效解题方法,并辅以大量难度渐进的练习以及托福考试难度的模拟题,帮助考生突破托福难关,提高英语水平。本系列既适合用于课堂.....
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