题目

Facebook CEO Mark Zuckerberg is planning to make his second visit to China. The world’s No. 1 social networking company is trying to find the best way to enter the country which is home to the world’s largest Internet market measured (衡量) by the number of users.“Our company aim is to connect (连接) the whole world,” said Mark. “But it’s impossible to think about doing that right now without China.”Created in a dormitory at Harvard University in 2004 by Mark Zuckerberg, Facebook has brought great pressure to Internet companies like Google and Yahoo as it has become a popular已知：|a-1|+|b-2|=0，1ab+1(a+1)(b+1)+1(a+2)(b+2)+…1(a+2011)(b+2011)=2012201320122013．