环境问题-- causeWe can blame some environmental damage on ignorance or poverty, but most damage has nothing to do with either. A major cause of environmental problems is the fact that clean air, clean rivers, and other natural resources are public, not private, possession. In Aristotle’s words, “What is common to the greatest number gets the least amount of care.”Individually, we gain by using these resources and so, in our own interest, we keep doing so. Eventually, the resources are damaged or run out, and then society as a whole has to pay the cost.空气污染—causeIndustry is another major cause of air pollution. Burning coal, oil and wood release carbon dioxide and other gases into the atmosphere. This is called the greenhouse effect. The result of greenhouse effect is global warming. Many scientists believe that global warming will cause worldwide flooding due to rising sea levels and serious climate change.能源短缺Not everyone agrees with the idea of energy shortage. Some argue that the future will be better. They say that we will know better ways to control our environment and that technology will provide us with new resources. For example, solar energy will replace coal and oil. Plastic will replace tin and other metals. In fact, this has been happening for some time. However, producing some of these new resources may contribute to the second major environmental problem—pollution.开头-男女平等In today’s society, it is easy to say that women have the same rights as men. Women can vote, drive a car, go to school, and have any job they choose. However, are women and men really equal? The answer to that question might surprise you.开头-科技的负面影响When we speak of the impact of technology on society, we always talk about the positive effects of technology. We talk about the Internet as an information resource and a communication platform, but conveniently ignore the fact that an overexposure to it leads to Internet addiction. We often discuss how technology has made our life easy but easily forget that it has made us overly dependent on it. Have you ever thought of the negative impacts of technology?举例-健康Consider a party person who may show good social skills, but the habit of partying late at night can disturb his sleeping pattern, which in turn can affect his physical and mental health. Now, consider a person who religiously follows his diet and exercise, but ignores attending social events and interacting with friends. This lack of social mobility can also be bad for mental health as he may feel isolated, which may lead to depression. So, we can see that to be a healthy person not only requires a healthy body and mind, but also a healthy social life. The three factors are interdependent on each other.Being social—effectsResearch has shown that social interaction has a positive influence on our health. A healthy social life can go a long way in reducing stress, elevating our mood and enabling us to manage the ups and downs in life in a better way. Being surrounded by good friends is a lot more comforting, and provides social and emotional support especially in times of grief.开头-work and happinessWhether work should be placed among the causes of happiness or among the causes of unhappiness is perhaps a doubtful question. There is certainly much work which is exceedingly weary and excessive work is always very painful. I, however, think that if work is not excessive in amount, even the dullest work is less painful than idleness.开头-年轻一代Much ink has been spilled in management books discussing how to get the most out of these youths in the workplace. Largely, they come to the same conclusion: Millennials are entitled, over-confident, and expect too much too quickly. We should not be surprised. Today’s young adults were raised by parents who made sure to boost their self-esteem at every turn, telling them they could achieve whatever they set their minds to, and handing out prizes for the sixth place.开头-旅游兴起The market for tourism in remote areas is booming as never before. Countries all across the world are actively promoting their wilderness regions, such as mountains, Arctic lands, deserts, small islands, to high-spending tourists. The attraction of these areas is obvious: by definition, wilderness tourism requires little or no initial investment.旅游-文化影响Once a location is established as a main tourist destination, the effects on the local community are profound. When hill-farmers, for example, can make more money in a few weeks working as porters for foreign trekkers than they can in a year working in their fields, it is not surprising that many of them give up their farm-work, which is thus left to other members of the family. In some hill-regions, this has led to a serious decline in farm output and a change in the local diet, because there is insufficient labour to maintain terraces and irrigation systems and tend to crops. The result has been that many people in these regions have turned to outside supplies of rice and other foods.旅游--对比Taking a holiday is no longer a question of catching a bus to the nearest seaside resort with your bucket and spade. Today’s pressurized lifestyles mean that going on holiday is a lot more stressful. We not only have to organize foreign travel and negotiate long, complex journeys, but also have to settle our home and work matters before we go.纸质书籍-总结I think physical books will have a longer existence as a commercial product than some currently predict. Like swords, books have symbolic power. Like fireplaces, they induce a sense of comfort and warmth. And, perhaps, similar to sails, they make a useful back-up for when the lights go out.大声阅读-Read aloud as much as possible. Your roommate, you wife, your sweetheart, your best friend will probably be glad to listen to you. You will be surprised to find how much more pleasure you get from reading by sharing it. Moreover, reading aloud is a valuable aid to interpretation.媒体-主题句+举例The media can provide important community information in the form of warnings. For example, the media can warn of the danger of an approaching hurricane or tornado. These warnings provide up-to-the-minute information on the location of the bad weather and alert people to take the necessary precautions. Without such warnings there would be a greater danger of loss of life and property.Another function of the media is education. A quick look though a television or radio guide will reveal many programs with an educational focus. These include documentaries on a wide range of topics such as animal behavior, geography, history, or art. They also include a wide variety of instructional programs such as cooking, home decorating, or investing. Some children’s programs are also educational, teaching children to count or recognize words, or introducing them to different societies and cultures.看电视里的暴力Does this violence on TV influence the audience? Tan(1985) claim ed that by watching violence we become l ess sensitive to it. That is, we become more tolerant of violence. Other studies have suggested that children who observe adults being aggressive toward each other usually increase the frequency with which they are aggressive.电视内容的虚拟与现实Studies have found that children do not easily understand the difference between fiction and reality in their TV viewing. This is of concern to many parents. Mothers interviewed in a study reported that they had to explain to young chil dren that getting hurt in television was not real. They pointed out, for exampl e, that although a cartoon character coul d fall off a high cliff and soon be walking and talking again, real people or an imals can’t recover from accident s in this way.家庭与儿童成长It's no secret what parents in solid, prosperous families do to give their children every chance of success in life. From the start, they strive to see that the children are safe and well-fed. They read to them, play with them, instruct them, discipline them and let them know they are loved. When the kids start school, these mothers and fathers meet with teachers, go to school events and insist that homework be completed. They ferry youngsters to soccer practices and piano lessons. They keep them off the streets. They encourage activities in and out of school that prepare them to be responsible, self-sufficient adults.。