What do you do when you need to look something up? Go to the library? Open an encyclopedia ? Click onto the Internet? These days, most people go straight to Wikipedia, the online encyclopedia. But how reliable is it? There is no denying the popularity and usefulness of Wikipedia. It attracts as many as 78 million visitors every month, and the site is available in more than 270 different languages. It's one of the most comprehensive resources available, which includes almost all details, facts and information that maybe concerned. It's got much more information than an ordinary encyclopedia. The site is updated on a daily basis by thousands of people around the world. Anyone with an Internet connection can log on and edit the contents or add a new page. And you don't need any formal training. Of course, there are some controls. Wikipedia has a team of more than 1,500 administrators who check for false information. And main targets for harmful comments(such as politicians) are _ to public editing. But with more than 16 million articles to keep an eye on, it isn't easy. So, while Wikipedia benefits from being constantly updated with information from all over the world, it's also open to "vandals"  . Some of the damage is easy to notice. One person drew devil horns and a moustache on Microsoft chairman Bill Gates' photo, while another edited Greek philosopher Plato's biography to say he was a "Hawaiian weather man who is wildly believed to have been a student of'Barney the purple Dinosaur' and to have been deeply influenced by his dog, Cutie". But other things are harder to spot. The most common form of vandalism involves adding tiny items of false information into the biography of a famous person. Unbelievably, some of this misinformation has appeared in newspapers, with The Daily Mail, The Guardian and The Independent all having fallen victim to the dirty tricks. For example, in an article about British comedian Sir Norman Wisdom, one newspaper claimed that he co-wrote Dame Vera Lynn's wartime hit There'll be bluebirds over the White Cliffs of Dover. He did no such thing. And in another article, it was reported that TV Theme tune composer Ronnie Hazlehurst had written the S Club 7's hit Reach. Once again, not true. So, if you are going to use any information from Wikipedia, make sure you double-check it first. We can learn from the passage that   _   .
because of its popularity, 78 million people from 270 countries visit Wikipedia monthly Wikipedia is the most comprehensive resource with all information we need anyone who has access to the Internet can edit any contents of Wikipedia as they like the primary job of the administrator is to make sure true information is conveyed