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  3. The year 2010 began with a herd of manufacturers chasing Amazon’s Kindle. It ends with some of the same companies in pursuit of

The year 2010 began with a herd of manufacturers chasing Amazon’s Kindle. It ends with some of the same companies in pursuit of

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问题     The year 2010 began with a herd of manufacturers chasing Amazon’s Kindle. It ends with some of the same companies in pursuit of Apple’s iPad. In between those tablet-computing crazes, we’ve all been challenged to keep up with the expanding universes of social networking and smartphones.
    Nothing illustrates what makes the tech business both fascinating and frustrating as well as the rise of Facebook. The social-networking site crossed the 500 million-user mark and debuted numerous features, such as an upgraded e-mail service and options to share your location with friends and get discounts from nearby retailers. But it also spent much of the year infuriating(触怒)users with privacy changes that exposed more of their data and were confusing or impossible to undo. The simpler privacy interface it launched in May should help, but it won’t if this company again forgets that its users don’t all operate at start-up speeds.
    Other social networks had a smoother road. Twitter offered its growing user base a more reliable service and a busier but more useful interface, while Foursquare had users checking into such far-off locations as the international space station.
    You can’t write the story of any of these sites without noting how smartphones have allowed their users to connect from so many places. Apple’s iPhone 4 led that pack in 2010, but Google’s Android operating system improved at a faster pace and didn’t require its users to sign up with only one carrier, even if some of the carriers selling Android phones showed a serious lack of taste in their tweaks(扭转)to Google’s software.
    I probably devoted more column inches to smartphones than to any other sort of hardware, and with good reason: This is the most exciting, fastest-moving part of the electronics industry. Tablet computers aren’t far behind, though. Apple’s launch of the iPad in January redefined this market in a way that finally made the concept relevant to home users. Competitors took the hint and have begun rolling out devices that will never qualify as "iPad killers" but do earn the title of " iPad competitor. "
    The success of the iPad and other tablets pushed down the price of the Kindle and other e-book readers. But Amazon’s e-reader may need to drop below $100 and get a major screen upgrade to hold its place in the market. Both smartphones and tablets have further eroded the significance of traditional desktop and laptop computers. Sure, people still buy the things in massive numbers. But when you can get so much work and piay done on a smartphone or tablet—or, for that matter, any other device with a browser that can run Web-based applications like Google Docs—why bother stressing out over your choice of one brand of computer?
    This trend has hurt Microsoft, the company that once benefited more than any other from the traditional computing market. Its biggest software shipment of the year, its Office 2010 productivity suite for its Windows operating system, was a yawner(无趣的东西)of a release.
This passage is mainly talking about______.
选项 A、the fast expanding of social networking sites
B、the popularity of smartphones and social networks
C、the development and advantages of tablet computers
D、the fierce competition in the operating system industry
答案B
解析 主旨题。本题考查对文章的整体理解。通读全文可知，本文主要论述了智能手机和社交网络的兴起与发展，并具体介绍了各个领域一些代表性产品或企业的现状，[B]与之相符，故为答案。[A]和[C]含义片面化，未涉及智能手机这个话题，故排除；[D]提及的操作系统行业竞争为文章细节，属于以偏概全，故排除。
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