【正文】 t have. That39。t buy a healthy body. If people are not healthy, they can39。18. Negative Effects of TelevisionIt is obvious that watching TV has bee an important entertainment for us, but do you know there are many negative effects of television? Frist of all, it is bad for our health. we may have less time to take exercise if we watch too much television, and it’s bad for our health. Second, television may produce great negative effects to our teenagers. Children do not have enough experience. They do not realize that TV programs often show an unreal world, On the other hand, watching TV may take much time of them, teenagers may have less time to study, and they will be less absorbed in study. In a word, maybe we can get much useful information from television, but there are many negative effects too, so we should have a correct attitude to television.19. The Importance of Physical ExercisesPhysical are so important to our health. First, physical exercises can improve blood circulation, speeding up the supply of nutrients and oxygen to every part of the body and the removal of waste from the blood through sweating and exhalation（呼氣）. Secondly, physical exercises can promote a healthy metabolism（代謝）. It helps with the digestion（消化） and absorption of food, thus giving everyone a good appetite. Thirdly, physical exercise can help consume excessive(多余的) fat in the body, preventing people from putting on too much weight, thus keeping them in good shape. Finally, after physical exercises we usually need a good rest and a sound sleep at night, refreshing us for the next day39。s lives are adversely affected by worsening environmental pollution?There is plenty of evidence to show that sustainable development can be achieved by balancing economic growth with protection of the environment. The key to achieving this is to make people aware of the seriousness of the problem. Both governments and ordinary citizens should join hands to make this world a better place to live in。我們所能做的就是培養(yǎng)自己的適應(yīng)能力對(duì)付它，而不是逃避。處于壓力下的人容易發(fā)揮自己全部的潛力，實(shí)現(xiàn)自己的個(gè)人價(jià)值——這正是人生的目的。然而，事實(shí)上，壓力并不是通常所認(rèn)為的壞事。在過去的幾年中，相當(dāng)數(shù)量的男性和女性選擇做某事在更少的成本競爭力舒適，輕松的生活，一個(gè)高收入的工作可以得到。我的朋友可能有自己的理由，但我不認(rèn)為他的決定是明智的現(xiàn)實(shí)。s case is not unique. In the last few years quite a number of men and women have chosen to do something less petitive at the cost of a fortable， easy life a highlypaid job can obtain. They are afraid that the stresses and strains of work will rob them of joy and happiness and do them harm both physically and mentally. In fact， however， stress isn39。t think his decision is wise in reality.　　It39。t the bad thing it is often supposed to be. Unless it gets out of control， a certain amount of stress is vital to provide motivation and challenge， and to give purpose and significance to an otherwise meaningless， idle life. People under stress tend to express their full range of potential and to actualize their own personal worth——the very aim of a human life.Stress is a natural part of everyday life and there is no way to avoid it. What we can do is to develop our adaptive abilities to deal with it rather than to escape from it.補(bǔ)： Is Pressure a Bad Thing?“I can39。但是，我們應(yīng)該使用它而不是玩的研究。學(xué)生可以通過這些事情的影響。學(xué)生可以在課堂上玩游戲。然而，電腦也有缺點(diǎn)。電腦也幫助學(xué)生很多，學(xué)生可以利用計(jì)算機(jī)檢索信息。教師可以利用計(jì)算機(jī)軟件來幫助教學(xué)。s puters.補(bǔ)： The Use of Computers in SchoolsWith the development of technology, almost every school have puters. And there is not doubt that puters can help study and teaching. Teachers can use puter software to help teach. They can use PowerPoint to show students the content of classes. Computers also help students a lot, students can use puter to search information. Students can also operate puters in puter class.However, puters also have disadvantages. For example, puters may be too expensive for some school in poor area. And students may play puter games in class. As we know, there are something harmful for students on internet. Students may be influenced by those things.In my opinion, puters are necessary. But we should use it to study instead of playing.使用學(xué)校的計(jì)算機(jī)隨著科技的發(fā)展，幾乎每一個(gè)學(xué)校都有電腦。s al