司马迁中国古代伟大的史学家、文学家,被后人尊称为“史圣”;他创作的史书成为我国第

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司马迁中国古代伟大的史学家、文学家,被后人尊称为“史圣”;他创作的史书成为我国第一部纪传体通史。这部书是(     )

A.《史记》

B.《汉书》

C.《通典》

D.《资治通鉴》

考点:汉赋和汉乐府纸的发明和蔡伦改进造纸术《九章算术》马王堆帛画
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电阻值分别为300Ω,200Ω,100Ω的三个电阻串联起来,接在220℃的电源上,试求该电路的总电流值是多少?

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以下关于人格障碍和人格改变的描述,最正确的是()

A.二者是完全不同的精神障碍概念

B.二者是完全相同的精神障碍概念

C.二者是有部分意义重叠的精神障碍概念

D.人格障碍是由人格改变进一步发展而成的

E.人格改变是由人格障碍进一步发展而来的

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软件是一种()产品。

A、有形

B、逻辑

C、物质

D、消耗

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请判别下面几种外文字母的字体,将其名称写出来。

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The sudden, dramatic explosion in value of online social media sites like Facebook and Twitter is reminiscent of the rise, about 15 years ago, of the online businesses that created the "dotcom bubble. " The Internet was far less widely used than it is today. Still, visionaries saw the potential for the Internet we have today, so virtual companies sprung up and grew like weeds as investors threw money their way. Some, like Google and Amazon, developed an enduring online presence and lasting financial value. But far too many quickly lost value when it became apparent that their rapid growth wasn’t yielding revenue.

So, how much is Facebook’s network of users really worth The potential is clear—when so many people are gathered in one virtual place, offering so much personal information about themselves, they create an unprecedented platform for targeted advertising. Or they would, if they were on the network to shop. When eBay and Amazon suggest products to their customers, they’re talking to people who’ve already proven that they’re interested in buying similar products. People go on Facebook for a variety of reasons-to catch up with old friends, share pictures, make new acquaintances, and talk, sometimes endlessly, about themselves. Whether they’ll appreciate having their virtual conversations interrupted by advertising, targeted or not, remains unclear.

It’s also unclear whether Facebook will actually be able to share information about its users’ browsing habits with advertisers. Complaints about the ineffectiveness of Facebook’s privacy policies have arisen in multiple countries, part of a larger social concern about how private information gets used on line. In December, the Federal Trade Commission issued a proposed framework that, among other things, would permit Facebook users to block advertisers from accessing information about their online interests. If that framework is implemented and widely used by Facebook subscribers, it could seriously impair the site’s value as a potential platform for targeted marketing.

What is clear is that Goldman Sachs has a significant interest in Facebook’s financial value, at least for the short term. Goldman Sachs’ decision to invest heavily in Facebook has had some interesting impacts. For one thing, the investment has allowed Facebook an opportunity to postpone issuing an IPO. That means that, at least for the moment, Facebook doesn’t yet have to disclose its finances or publicly address investor complaints.

Goldman Sachs’ investment also puts the firm in an ideal position to handle Facebook’s IPO when it eventually is issued, perhaps sometime next year. That, of course, has the potential to generate substantial revenues for Goldman Sachs’ clients. Google’s 2004 IPO raised an initial $1.2 billion for the company. After all the propaganda, Facebook’s IPO can hardly be expected to raise less. However, there remains a significant question as to whether Facebook’s potential for generating income is more virtual than real. If it turns out that Facebook can’t live up to its potential for generating advertising revenue, venture capitalists who invest for the long term may get burned.

The text is written to answer the question()

A. Will the social media be the next dotcom bubble

B. Does Goldman Sachs really want to invest in Facebook

C. When will it be the right time for Facebook to issue its IPO

D. What lessons can we learn from the ups and downs of social media

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