要点：1).剪纸艺术起源于6世纪或甚至更早；

2).剪纸过去是为了宗教祭祀，现在是为了烘托节日气氛；

3).中国剪纸已发展成一种艺术。

注意：1).词数l00左右。

2).可以适当增加细节，以使行文连贯。

3).开头和结尾已经为你写好。

参考词汇：剪纸paper cutting

Dear friends,

    I'm Li Hua.I feel honored to be your Chinese teacher this summer.

    That's it.Now let's begin our class.

信息：看国内外新闻、获取其它信息

通讯：发e-mail、打电话

学习：上网上学校、阅读各种书籍、自学外语

娱乐：欣赏音乐、观看体育比赛、玩棋牌游戏

生活：购物

    "I think I'm nothing more than a dead fish." "I don't want to do anything." "I'm so beat and so sad."... The young generation in our country used to enjoy their "happy culture" but now they have become "beat and sad" slowly and secretly. Some people even called it "the beat culture". The "Beat" youths don't want to do anything. They have no purpose, no desire and they are totally depressed so that they only want to live an aimless life. The "Ge You slouch (葛优瘫)" and the song I feel like having been drained are the examples.

    Many media concern themselves about this phenomenon and try to persuade the youths into embracing positive and healthy feelings and encourage them to work hard to get rid of decadence. This is really a kind gesture. However, we don't have to worry too much about this "beat culture." In fact, it's not a negative thing. "Beat" never means despair, but a way of self-mockery (自嘲) and pressure relief.

    In general, the youths in China are not "beat". According to a recent international research, the youths in China hold positive attitude towards the future. 29% of the Chinese interviewees believe they will live and work in peace in China because "as long as you work hard, you can have your own day". Around 93% of the Chinese interviewees believe the future is promising because of medicine industry, renewable energy sources and computer. Compared with Chinese youngsters, youths in developed countries are more pessimistic.

    Of course there are some social reasons for the appearing of "the Beat Culture". As urbanization develops rapidly, youths living in big cities are facing new challenges that their forefathers have never encountered before. Loneliness and feelings of insignificance and powerlessness are easy to get hold of the young people. Without proper care, they could threaten our mentality and cause many social problems. These problems probably need our attention more.

    An international team of researchers found employees who endure what is known as "abusive supervision" are more likely to behave poorly on purpose by messing up tasks, arriving late, taking long breaks and putting in minimal effort.

    The authors of the study, published in the Journal of Management, sought to answer why horrible bosses make employees less willing to show what is known as organizational citizenship behavior (OCB), or commitment to the company outside of their contractual obligations. That could include helping colleagues or volunteering for unusual work hours. They also assessed its effect on a worker's tendency to harm the organization, by displaying counterproductive (反作用的) work behavior (CWB).

    To find out more, and uncover which negative outcome bullying (欺凌) behavior is more likely to cause, researchers from Southwestern University of Finance and Economics in China, Renmin University of China and Swinburne University of Technology in Australia cooperated and analyzed 427 existing studies. They found workers acted out either because they felt they were being treated unfairly in the workplace, or felt stressed and this affected their ability to perform as expected. An employee who felt they were a victim of injustice tended more towards reluctance to show OCB. Stressed workers, meanwhile, were more associated with CWB.

    Employers who worried supervisors are affecting productivity can take steps to ease issues by regularly training managers, introducing policies which cope with workplace injustices and helping workers to deal with stress.

    This is not the first study to suggest unkind practices can affect the well-being of workers. The paper follows a study published in the European Heart Journal last year, which showed employees who suffer bullying are more likely to develop heart diseases than those who aren't. Bullying and violence are common at workplaces and those exposed to these stressors are at higher risk.

The Possible Health Dangers of Air-conditioners

Although many of us may feel air-conditioners bring relief from hot, humid or polluted outside air, they pose many potential health hazards. Much research has looked at how the movement of air inside a closed environment—such as an office building—can spread disease or expose people in the building to harmful chemicals.

    One of the more widely publicized dangers is that of Legionnaire's disease, which was first recognized in the 1970s. This was found to have affected people in buildings with air-conditioning systems in which warm air pumped out of the system' cooling towers was somehow sucked back into the air intake, in most cases due to poor design. The warm air, filled with bacteria, was combined with cooled, conditioned air and was then circulated around various parts of the building. Studies showed that even people outside such buildings were at risk if they walked past air exhaust pipes.

    Large air-conditioning systems add water to the air they circulate by means of humidifiers. In older systems, the water used for this process is kept in special reservoirs, the bottoms of which provide breeding grounds for bacteria which can find their way into the ventilation system. The risk to human health from this situation has been highlighted by the fact that the immune systems of approximately half of workers in air-conditioned office buildings have developed the ability to fight off the organisms found at the bottom of system reservoirs. But chemicals called “biocides” are added to reservoirs to make them germ-free, and they are dangerous in their own right in sufficient quantities, as they often contain compounds strongly linked to cancers.

    Finally, it should be pointed out that the artificial climatic environment created by air-conditioners can also affect us. In a natural environment, whether indoor or outdoor, there are small variations in temperature and humidity. Indeed, the human body has long been accustomed to these normal changes. In an air-conditioned living or working environment, however, body temperatures remain well under 37℃, our normal temperature. This leads to a weakened immune system and thus greater exposure to diseases such as colds and flu.

    Over the past few years, there has been a big increase in the number of people sharing information online. In this article we will learn about some positive factors for people to share information online.

    We often share information with our friends in the office or at home to educate, entertain or pleasantly surprise them. In this way we can connect with others. This is also true while sharing information online. If you look at the Facebook wall posts of your friends, you will realize that most of their updates are usually famous quotes, entertaining videos, inspirational images, funny jokes, etc. 94% of those who responded to a survey by the New York Times said they put a lot of thought into how the content they are sharing will be beneficial to others.

    A lot of people share information online to represent their true self to the outside world. Some people, especially those who are shy and not comfortable talking about their areas of interest in the presence of others, find it extremely convenient to share that information online with like-minded individuals.

    78% of the respondents in the study of The New York Times said they shared information online because it helps them develop better relationships. Today, a lot of people do not have the time to meet each other in person and the Internet has become a great substitute. A lot of people now "meet" each other online, rather than in conventional places like restaurants and pubs.

    Lastly, when we share our thoughts online, we are actively engaging with the vast community of people who are a part of the World Wide Web. Sharing information will make a difference to the viewpoint of others, or add to their understanding about the world.