[单项选择]

To Tweet or Not to Tweet

The economy may be troubled, but one area is thriving: social media. They begin with Facebook and extend through a dizzying array of companies that barely existed five years ago: Twitter, LinkedIn, Groupon, Yammer, Yelp, Flickr, Ning, Digg—and the list goes on. These companies are mostly private but have attracted the ardent attention of Wall Street and investors, with Facebook now worth a purported ＄75 billion and Groupon valued at close to ＄25 billion.
There can be little doubt than these companies enrich their founders as well as some investors. But do they add anything to overall economic activity While jobs in social media are growing fast, there were only about 21,000 listings last spring, a tiny fraction of the 150 million-member U.S. workforce. So do social-media tools enhance productivity or help us bridge the wealth divide Or are they simply social-entertaining and diverting us but a wash when it co

最新试题

• ●    [单选题]接算站示意图中,黑色的点划线表示为( )。
• ●    用于治疗晕动症（）
• ●    [单选题]单选题:自动检票机(AGM)的功能不包括的是( )。
• ●    [单选题]依据《中国南方电网有限责任公司现场作业违章扣分管理办法》第六条规定:()类违章是指,已经或
• ●    [判断题]消防员隔热防护服应及时清洗、擦净、晾干。隔热层和外层不可分开清洗。 ( )
• ●    [单选题]带电设备红外测温检测中，我们一般将氧化金属导线的发射率设置为（ ）。