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对比分析赫尔巴特的传统教育理论与杜威的现代教育理论的特点。


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问题 It would be all too easy to say that Facebook’s market meltdown is coming to an end.After all,Mark Zuckerberg’s social network burned as much as$50 billion of shareholders’wealth in just a couple months.To put that in context,since its debut(初次登台)on NASDAQ in May,Facebook has lost value nearly equal to Yahoo,AOL,Zynga,Yelp,Pandora,Open Table, Group on,LinkedIn,and Angie's List combined,plus that of the bulk of the publicly traded newspaper industry: As shocking as this utter failure may be to the nearly 1 billion faithful Facebook users around the world,it’s no surprise to anyone who read the initial public offering(IPO)prospectus(首次公开募股说明书).Worse still,all the crises that emerged when the company debuted-overpriced shares,poor corporate governance,huge challenges to the core business,and a damaged brand-remain today.Facebook looks like a prime example of what Wall Street calls a falling knife-that is,one that can cost investors their fingers if they try to catch it. Start with the valuation.To justify a stock price close to the lower end of the projected range in the IPO,say$28 a share,Facebook’s future growth would have needed to match that of Google seven years earlier.That would have required increasing revenue by some 80 percent annually and maintaining high profit margins all the while. That’s not happening.In the first half of 2012,Facebook reported revenue of$2.24 billion,up 38 percent from the same period in 2011.At the same time,the company’s costs surged to$2.6 billion in the six-month period. This so-so performance reflects the Achilles’heel of Facebook’s business model,which the company clearly stated in a list of risk factors associated with its IPO:it hasn’t yet figured out how to advertise effectively on mobile devices,The number of Facebook users accessing the site on their phones surged by 67 percent to 543 million in the last quarter,or more than half its customer base. Numbers are only part of the problem.The mounting pile of failure creates a negative feedback loop that threatens Facebook’s future in other ways.Indeed,the more Facebook’s disappointment in the market is catalogued,the worse Facebook’s image becomes.Not only does that threaten to rub off on users,it’s bad for recruitment and retention of talented hackers,who are the lifeblood of Zuckerberg’s creation. Yet the brilliant CEO can ignore the sadness and complaints of his shareholders thanks to the super-voting stock he holds.This arrangement also was fully disclosed at the time of the offering.It’s a pity so few investors apparently bothered to do their homework. What is the most probable reason for some rich people to use a device to record their patterns 《》()A.They have trouble falling asleep. B.They want to get sufficient sleep. C.They are involved in a sleep research. D.They want to go to bed on regular hours.

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问题 某市教委在教师中随机调查,问“您热爱学生吗”90%以上的教师都回答“是”。而当转向问他们所教的学生问“你体会到老师对你的爱了吗”时,回答“体会到了”的学生仅占10%。这说明( ) A.教师还没有掌握高超的沟通与表达技巧 B.教师尚不具崇高的道德境界 C.教师缺乏信心 D.教师缺乏爱心
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