题目

Do you know Weibo? Do you write a Weibo? If you don’t, you are “out” ! Weibo means micro-blog. People may spend much time writing a blog, but it takes a little time to write a micro-blog. Why? Because every message on a micro-blog is less than 140 words.Micro-blog started in the USA. It came to China in 2009 and it has developed very fast. In 2011, the number of Chinese micro-bloggers grew to 300 million. Now more and more people are interested in writing micro-blogs. For many micro-blog users, it is a great way of learning the freshest news, talking with friends and sharing (分享)diff2．鸭绿江口湿地是鸟类的天堂，面积超过101000公顷，101000用科学记数法表示为1.01×105．