Bad news sells. If it bleeds, it leads. No news is good news, and good news is no news. Those are the classic rules for the evening broadcasts and the morning papers. But now that information is being spread and monitored in different ways, researchers are discovering new rules. By tracking people's e-mails and online posts, scientists have found that good news can spread faster and farther than disasters and sad stories.

    "The 'if it bleeds' rule works for the mass media," says Jonah Berger, a scholar at the University of Pennsylvania. "They want your eyeballs and don't care how you're feeling. But when you share a story with your friends, you care a lot more how they react. You don't want them to think of you as a Debbie Downer."

    Researchers analysing word-of-mouth communication—e-mails, web posts and reviews, face-to-face conversations—found that it tended to be more positive than negative, but that didn't necessarily mean people preferred positive news. Was positive news shared more often simply because people experienced more good things than bad things? To test for that possibility, Dr Berger looked at how people spread a particular set of news stories: thousands of articles on The New York Times' website. He and a Penn colleague analysed the "most e-mailed" list for six months. One of his first findings was that articles in the science section were much more likely to make the list than non-science articles. He found that science amazed the Times' readers and made them want to share this positive feeling with others.

    Readers also tended to share articles that were exciting or funny, or that inspired negative feelings like anger or anxiety, but not articles that left them merely sad. They needed to be aroused one way or the other, and they preferred good news to bad. The more positive an article, the more likely it was to be shared, as Dr Berger explains in his new book, Contagious: Why Things Catch On.

    Here are the headlines from BBC World News. The United Nations Conference on the Human Environment opened this morning in New York. The (protect) and improvement of the human environment is a major issue which affects all the people and economic development throughout the world.

     American airliner was hijacked (劫持) on a flight from Los Angeles to New York. The hijack (take) place at eleven this morning. The hijacker,identity is not known, demanded to see the American President. The plane is at present at John F. Kennedy International Airport in New York, where has been surrounded by the police.

    The largest quantity of illegal drugs ever was found a London flat yesterday. A police spokesman said that the drugs (hide) in suitcases. He said the value of the drugs was well over five million pounds and the case needed (far) investigation.

    A major accident in southern Sweden happened today. It's reported that this afternoon a ship crashed into a bridge. (lucky), seven cars and six trucks are said (fall) into the water from the bridge. We hope to have more details in our next news broadcast. Those are the latest headlines.

汤姆来了，又喝醉了。

你可以根据学习进展的情况对你的学习时间表做出调整。