求关于宇宙的英语演讲稿，初中水平，急
你可以自己写嘛，再拿给老师检查下，这样提高的快___范文:Good morning or afternoon, everybody! I am glad to meet you here and at the moment. Thanks for sparing your precious time to listen to my speech about how to learn English. I hope you could understand my English teaching approaches and idea, and hope I could bring you and your children delight for learning English and progress in English.The importance of English worldwide1、Over 337 million people speak english as their first languge.2、About 350 million people speak english as a second language.3、In the top ten of world languages, english occupies the 3rd place.4、English is also the favored language of science, commerce, and airline companies.5、Over 80% of the world’s electronically saved in formation is in English.English is the world’s leading international language. It is the principal language spoken in Britain, the USA, Canada, Australia, New Zealand, and some other countries such as Uganda and Botswana. About 320 million people speak english as their first language- about the same number as Spanish, but less than Mandarin Chinese or Hindi.English is officially spoken in: United Kingdom, USA, Canada, Austrlia, Zimbabwe, South Africa, New Zealand, Philippines, Singapore, Hong Kong, Belize, Jamaica, Guyana, American Samoa, Anguilla, Antigua, Bahamas, Barbados, Belau, Bermuda, Botswana, British Indian Ocean Territory, British Virgin Islands, British west indies, Brunei, Cameroon, Cook Islands, Dominica, Ethiopia, Falkland Islands, Fiji, Gambia, Ghana, Gibraltar, Grenada, guam, Ireland, Jersey, Kenya, Kiribati, Lesotho, Liberia, Malawi, Malta, Mauritius, Micronesia, Midway islands, Namibia, Nauru, Nigeria, Niue, Norfolk island, Pakistan, Pitcairn, Puerto rico, Samoa, Seychelles, Sierra Leone, Solomon islands, Somalia, St. Helena, St. Kitts-Nevis, St. Lucia, St. Vincent and the Grenadines, Swaziland, Tokelau, Tonga, Trinidad and Tobago, U.S. Virgin Islands, Uganda, Vanuatu, Wake Island, and Zambia.The total number of english speakers in the world is estimated to be about 460 million-second only to Mandarin Chinese. English is the second language of India, South africa and many parts of Africa and Asia. But – more and more- it is also the language of international commerce, of business, of diplomacy and of tourism. One out of five of the world’s population have some degree of competency in English.The majority of international trade and commerce, and most international communications, use english. The importance of american internationa corporations has positioned English as the international language of business; and Hollywood and the music industry have make sure that is stays thhe principal language for the media and showbiz.
求写一篇300词左右的关于60年建国的英语演讲稿
这是我以前写的一篇，如果是男学生，把里面的daughter改成sonDear Motherland,I am so proud of being a Chinese. As a daughte(or son) of the greatest country who has the long history of more than five thousand years, I am so lucky.I learn a lot from your history and culture, which are remarkable in the world. And as a result I am deeply attracted by the interesting and instructive events and historical figures. Sixty years ago, with the establishment of People's Republic of China, Chinese people started a totally new life.During the past 60 years, China became richer and stronger. Yes, we used to be treated as a weak nationality but after 60 years it is not the case any longer.Nowdays, we live a much happier life than before and this should be owed to the distribution of hundreds and thousands of pioneers who devoted themselves to the independence and improvements of China. In the 60th National Day, we must momerize these heros.For me, the best way to momerize is to study hard and master more knowledge to construct our mother country which is deeply loved by all of us.The past 60 years belongs to the heros, the constructors of China and of course, several great leaders such as Chairman Mao, Premier Zhou, and Dengxiaoping. And we are confident that we can go along their road in the future.The prosperity of motherland make it possible for all of us to improve the quality of life. Especially, for the young students like me. First, we dont need have to worry about the foods and houses like children several decades ago. We all have a happy childhood and this is help to form our active and optimistic characters. Second, state has established a relatively sound education system and thus we can receive perfect and necessary educaion. It’s of great importance for our future. Third, with the development of national economy, adults can obtain more employment opportunities and then, they may earn enough money to afford family expenditures. And children, together with their parents and grandparents, will have stable families which make all people happy. Fourth, China makes more and more communications with other countries around the world and this makes it is possible for us to know more about the world. Fifth, we also benefit from the public facilities such as transportations, stadiums and hosptials. For example, travelling becomes easier than before and we children can find a lot of place to play on. Furthermore, when we catch a cold or feel sick, we can go to hospital and be treated easily. When we want to enjoy a new film, there are many cinemas available. In a word, all these exciting changes should be owed to you, my mothercountry.As a student in the new age, I know that we are responsible for the future and development of you, my dear mother country. As for me, it’s nature to do something valuable to return you, my dear motherland. Yes, I know I am to young to make great contributions to you currently. But I have decided to be a useful person to the society in the future. To achieve this goal, I should make preparations. First, just as mentioned above, it’s obvious to study hard is of the most importance for me. Otherwise, even I really want to do something good when I grow up, I have not sufficient ability. It will be sad for me. To avoid the regret, I have to master knowledges and skills as much as I can. Second, I will always remember I am a Chinese and I am proud of this as well. If I have any chance, I will tell foreigners China is a great country and always willing to make friends with other countries.Third, I will care others more as this will help the constuction of a harmonious society. Young as I am, I should do my best to meet the calling on of you.China is another mother. I respect you and wish a better future.Yours Sincere DaughterXXX亲爱的祖国：我很自豪自己是一个中国人。
您拥有悠久和历史和文化，是世上最伟大的国家。
能够成为您的女儿，是我的幸运。
从您闻名与世的历史和文化中，我学到了许多，并被那些有趣且有教育意义的事件和历史人物所打动。
六十年前，随着新中国的成立，中国人民开始了全新的生活。
在过去的六十年间，中国越发的繁荣和富强。
是的，我们曾经被认为是一个弱小的民族，但是经过了六十年的发展，情况早已改变。
现在，我们的生活比以前幸福许多，而这一切需要归功于无数为了国家独立和发展而献身的英数先烈。
在国庆六十周年之际，我们不要将他们忘记。
对我而言，最好的纪念就是努力学习，掌握更多的知识，为建设我们心爱的祖国而努力。
过去的六十年属于英雄，属于新中国的建设者，当然还属于几位领袖，如毛主席、周总理和。
我们有信心在将来沿着他们开拓的道路继续前行。
祖国的繁荣使得生活水平的提高成为可能，尤其是对象我这样的孩子来说更是如此。
首先，我们不需要再象几十年前的孩子那样为温饱担忧。
我们拥有幸福的童年，这对培养我们积极和乐观的性格极有帮助。
其次，国家建立了一套相对完善的教育体制，使我们可以得到完善而必须的教育，这对我们的未来发展极其重要。
第三，随着国家经济的发展，成人们可以获得更多的就业机会，他们因此可以有更多的收入来负担家庭的各项开支。
因此，孩子们和家人都可以拥有一个稳定的家庭，而稳定的家庭使所有的人都感到幸福。
第四，中国与其他国家的交流越来越频繁，因而我们可以更多地了解外部世界。
第五，我们也从国家的公共建设，诸如公共交通、体育场和医院上面获益良多。
比如说，旅游变得比以前更容易了，孩子们也可以找到更多的地方玩耍。
还有，当我们感冒或者不舒服的时候，我们可以很容易找到医院就诊。
而当我们想去看一部新电影时，有很多电影院可供选择。
总而言之，这些激动人心的变化都应当归功与您，我的祖国。
作为一个新时代的学生，我知道我们对您的未来和发展负有责任，我亲爱的祖国。
就我而言，做些有价值的事情来回报您是很自然的。
是的，我知道我还很小，目前还不能为您做出很大的贡献，但是我已经决心将来成为一个对社会有用的人。
为了实现这个目标，我现在就要做些准备：首先，正如我在上面所提到的，努力学习对我来说是最重要的。
否则的话，即便我长大后真的想做些有用的事，我可能发现自己没有足够的能力。
这样就太悲惨了。
为了避免出现这种遗憾，我必须尽可能地多学些知识和技能。
其次，我会永远牢记自己是一个中国人，并且我也为此深感自豪。
如果我有机会的话，我会告诉外国友人，中国是一个伟大的国度，并且一直愿意和其他的国家交朋友。
第三，我会更多地关心他人，因为这样会有助于我们建设一个和谐社会。
虽然我还很小，但是我会尽力响应您的号召的。
中国是另一位母亲，我尊敬您并祝您的未来更美好。
您忠实的女儿XXX
急求一份关于情感的英文演讲稿 时长五分钟 急急
谢谢大家啦
环保问题: (1) As is apparently revealed in the pie charts above, forty-eight percent of people surveyed have never heard of the International No Motor Vehicle Day while fifty-seven percent are willing to give up driving on such a day. What is betrayed in the pie charts is most thought-provoking. The implied meaning of the pie charts is both disappointing and exciting. On the one hand, much necessary work still needs to be done with respect to environmental protection. The public ignorance of relevant environmental protection results from inadequate and limited popularity of environmental protection knowledge by relevant government departments at different levels. Since environmental protection is an international issue, we must constantly introduce the advanced and practical practice in other countries to our general public. Only in this way can we promote environmental protection in China. On the other hand, the enhancement of the public awareness of environmental protection is a welcome development. Over the past years, as people’s living standard improves, people attach more importance to the quality of their life. They have a better understanding of the relationship between environment and their daily life. As a result, they are more interested in following positive international models. In sum, we have got a mixed feeling toward the very fact revealed in the pie charts. In my view, necessary measures should be immediately taken to ensure a nice environment. First of all, government departments at all levels must play a more active role in popularizing international experience and practice of environmental protection. What’s more, the general public should be encouraged to participate more actively in environmental protection. Only in this way can we live in a healthy and harmonious environment. (278 words)(2) 一．自我介绍：Honorable Judges, Ladies and gentlemen, Fellow students, Good morning\\\/afternoon:尊敬的评委，先生们，女士们，各位同学们，早上\\\/下午好
I’m very glad to be here. My name is Wangqihang.非常高兴能参加比赛。
我的名字叫王启珩。
I’m ten years old. I come from Huanxi Primary school. I’m in Class 3, Grade 5.我今年10岁。
我来自环西小学，现在五年级三班。
As a happy boy，I have many hobbies, such as sports, playing piano, singing, and drawing.我是一个快乐男孩。
我有许多爱好，比如体育运动，弹钢琴，唱歌，画画等。
Among them, travel is my favorist one. I have visited some other cities, like Beijing, Hainan, Chongqing, Guangxi, Qindao, Dalian and so on.旅游是我的最爱。
我去过不少地方，如北京，海南，重庆，广西，青岛，大连等。
Everywhere I went, I enjoyed the natural scenery and appreciated the human landscape very much.每到一处都尽情享受那的自然风光与人文风情。
Not only that, I want to go abroad to take in the beauty of the custom of other countries in the future.不仅如此，我还希望能出国领略各国的民俗风情。
And I even dream about what the life will be when we are on planets other than our Earth.甚至我还梦想着在地球外的其它星球上生活将会是怎样的。
That is why I’m so interested in the following scientific report recently.所以最近我对下面这篇科学报道非常感兴趣。
二. 演讲部分：在我们享受的时候懂得珍惜Cherish what we are enjoyingIt is a report about the new planet which holds possibility for life.这是一篇关于发现了一颗有生命可能性的星球的报告。
It shows that European astronomers have discovered a new planet, they name it Gliese 581 c.说欧洲天文学家们发现了一颗新的星球，代号为“Gliese 581C”。
It is about 20.5 light years from our earth. They estimated the planet's average temperature at between 0 and 40 degrees Centigrade. It is orbiting the red dwarf star, Gliese 581.它距地球约20.5光年。
他们估计它的平均温度约在0℃～40℃之间。
它围绕着红矮星Gliese 581运行。
Most important of all, it’s an earth-like planet. There might be mountin, sea and liquid water.最重要的是，这颗星球和地球非常相似，它可能有山峦，有海洋，还有液态水。
So the astronomers believe that it is potentially habitable.所以科学家们相信它能支持生命的存在。
However, Gliese 581 c might be tidally locked to it’s sun-the dwarf star the way our moon is to the Earth.然而，就像月球一样，它只会公转，不会自转。
It means that it must always show its same face to its sun, and that while one side would be too fiercely hot to support life, the other side would be too cold.这就意味着它面对红矮星的一面会太热不适合生命体而背对红矮星的一面则会很寒冷。
This report makes me to realize that how valuable our earth is.这使我认识到我们地球有多么珍贵
Everyday, we can see sunrise and sunset.我们每天都可以看到日出日落。
The day and night keeps on exchanging. It’s not too hot in the daytime while not to cold at night.一天早晚有变化，昼夜不停地交换使白天不过分热，夜晚不过分冷。
Everyday, I go to school cheerfully in the morning and skip along at the way home as the sun set.清爽的早晨，我可以背着小书包高高兴兴地去上学。
夕阳西下，我又蹦又跳地回到家。
We could experience changes through the four seasons of one year. 一年四季有变化。
Spring is the season sowing seeds. It is pregnant with life and green.春天是播种的季节，充满了生机和绿色。
In the Summer, colorful swimming suits frolick in the water happily.夏天五颜六色的游泳衣在水里欢快地嬉戏。
Autumn is the harvest season , the paddy fields and trees are covered with golden color.秋天是丰收的季节，金黄铺满了稻田洒满了枝头。
In the winter，We can have snow battle, playing to our hearts' content in the world of silvery white.冬天我们打着雪仗，尽情地在银白色的世界里玩耍。
How fortunate we are because we can live on the earth!能生活在地球上,我们是多么地幸运啊。
We should cherish it, instead of polluting it, spoiling it or even destroying it.我们要珍惜它，千万别污染它，别糟践它，别破坏它
If One day, it is really angry and stop rotation, that will have be a disaster for us human being.如果有那么一天，它真的生了气停止了自转，那将是我们整个人类的巨大灾难。
So, let us protect our earth with our love, making it better and more harmonious.所以，让我们大家用自己的爱来好好保护宇宙中这颗唯一的地球吧，使它更美好更合谐。
三．才艺表演Ladies and gentlemen, Now let me show you a story about the monkey and the moon.先生们女士们，现在我给大家表演一个关于猴子与月亮的故事。
猴子捞月的故事：One day, a little monkey is playing by the well.一天，有只小猴子在井边玩儿。
He looks in the well and shouts :它往井里一瞧，高喊道：“Oh! My god! The moon has fallen into the well!”“噢
我的天
月亮掉到井里头啦
”An older monkeys runs over, takes a look, and says,一只大猴子跑来一看，说，“Goodness me! The moon is really in the water!”“糟啦
月亮掉在井里头啦
”And the oldest monkey comes over.老猴子也跑过来。
He is very surprised as well and cries out:他也非常惊奇，喊道：“The moon is in the well.”“糟了，月亮掉在井里头了
”A group of monkeys run over to the well.一群猴子跑到井边来，They look at the moon in the well and shout:他们看到井里的月亮，喊道：“The moon did fall into the well! Come on! Let’s get it out!”“月亮掉在井里头啦
快来
让我们把它捞起来
”Then, the oldest monkey hangs on the tree up side down ,with his feet on the branch .然后，老猴子倒挂在大树上，And he pulls the next monkey’s feet with his hands.拉住大猴子的脚，All the other monkeys follow his suit,其他的猴子一个个跟着，And they join each other one by one down to the moon in the well.它们一只连着一只直到井里。
Just before they reach the moon, the oldest monkey raises his head and happens to see the moon in the sky,正好他们摸到月亮的时候，老猴子抬头发现月亮挂在天上呢He yells excitedly “Don’t be so foolish! The moon is still in the sky!”它兴奋地大叫：“别蠢了
月亮还好好地挂在天上呢
”This is the end of the story. Do you like it?故事到这里就结束了。
你们喜欢吗
四．尾声Hope you all can remember me, Wangqihang, a happy guy like the sunshine.希望大家能记住我，王启珩，一个阳光般的快乐男孩。
Welcome you to visit my blog at 欢迎大学到 访问我的博客。
Thank you very much.谢谢大家。
(3)打好环保比赛、创建绿色北京 尽管2008北京奥运会离我们还有3年之遥，但有一项规模宏大的特殊比赛已经拉开了序幕。
这场比赛的参加者并非来自世界各国的体育选手，而是身处北京的每一位公民，比赛的场所就是我们身边的街区小巷。
我想大家已经想到了我所说的这项特殊比赛，这就是创建绿色北京、保护美好环境。
那么在这场环保大赛中，我们究竟要与谁一比高低
是繁华现代的洛杉矶、风光迷人的悉尼、还是古老神奇的雅典
都不是
比赛的对手就是我们自己，就是我们自身淡漠的环保意识。
几年前有幸在美国加州度过的一段时光，既让我享受了那里宜人的环境，更让我领略了当地人民高度的环保意识。
每当说到城市环保，我的眼前总会浮现出加州那蔚蓝的天空、明媚的阳光、碧绿的草地以及嬉戏在树枝间的松鼠、彩蝶和百灵鸟。
记得刚到美国时，常去爸爸工作的美国地质调查局玩耍，每次均能看到许多人骑自行车上下班，而其中一位满头白发的骑车老人，引起了我的好奇。
我问爸爸，那个爷爷为什么总骑车上班，是不是没钱买车
爸爸笑道：没钱买车
嘿，说出来吓死你，他可是世界上顶级的大科学家。
要论钱，他可以买一个车队呢。
那他咋不买车呢
骑车多累呀
他有车，但平时除非下雨或购物，一般不去开。
在美国有许多人都是环保主义者，为了节约能源和减少汽车尾气对大气的污染，他们用实际行动倡导人们尽量少开车。
而我们所居住的这座美国城市，还特别将每年的5月19日定成了'骑车上班日'，以支持和宣传这种有效的环保行为。
后来，我还在经常的搭车出行中获知了他们的另一件环保趣事：在美国的许多州，政府为了鼓励大家多坐公交车或几人合用一辆车，以节省能源和缓解交通压力，在城市内一些主干道路上开辟有专门的'钻石车道'，只有乘坐了二人或二人以上的车辆才从此通过。
美国人民这种自觉的环保意识和政府有效的环保措施使我从内心对他们充满了敬佩。
并深刻地影响了我的环保理念。
回国后，常常有人问我：美国好吗
我总会脱口而出：确实好
最好的是环境。
说句真心话，回国三、四年，美国那边同学和老师的面孔已经逐渐模糊，但加州那宜人的自然环境，却每每清晰地浮现在我的眼前，成为我最深的记忆和期盼故地重游的缘由，也成了我心目中北京环境的蓝图。
2008奥运会为我们倡导和实施北京的环保提供了契机，北京能否有朝一日也拥有象加州那样美丽的环境
答案是肯定的。
但需要我们以真正的环保之心和切实的环保行动去一步一步地实现。
从现在开始，如果每一位有车的朋友一星期可以少开一、两次车，每个让家长用车接送的同学一周能主动让家长少接送一两趟而改乘公车或骑自行车，我们就会有拥有更多的蓝天……。
只要我们每一位北京市民都能够自觉的从身边的环保小事做起，加州的蓝天、白云和绿草地就会在北京安家，美国的松鼠、彩蝶和百灵鸟就会来北京落户。
涓涓细流可以汇成滔滔江海，片片绿叶能够造就莽莽森林。
只要我们每一位北京市民都拿起手中的环保之笔，在我们所处的街头巷尾，为北京这幅美丽而古老的画卷添上自己的一抹绿色，就能使北京掩映在绿色的海洋中。
让我们一起行动起来，用我们集体的力量来打赢这场环保之赛，向全世界展现一块最大的金牌，这就是绿色北京、精彩奥运。
Win Competition of Environment Protection for Beijing Although the 2008 Olympics are still three years away, another special competition has already started in Beijing. This time, the competitors are not the athletes from all over the world, but the people living in Beijing. The special competition is not held in a stadium, but in every street and every corner of Beijing. I suppose some of you may have already guessed what the special competition is. Yes, it is the competition of protecting our environment and creating a green Beijing for the 2008 Olympic Games. Someone may ask who is our rival in this competition? The modern Los Angeles, the charming Sydney, or the historic Athens? No, none of them. The real rival is ourselves. It is our bad habits of neglecting to protect environment in our daily life. Several years ago, I was very lucky to have an opportunity to live in the United States for about two years. I not only enjoyed the beautiful environment there, but also appreciated the American people's active way of protecting their environment. Now, whenever the environment protection is mentioned, a beautiful view of California will arise in my mind: white clouds flying across the blue sky, green grassplot sprinkled with colorful flowers and small animals playing happily among the trees. I remember that at the beginning of my coming to America, I often went to my father's working place, the United States Geological Survey, to have fun. Each time I found a lot of people riding bicycles to their offices. Among the cyclists, an old man with white hair attracted my attention. Curiously, I asked my father, Why does the old man ride his bike to work every day? Doesn't he have enough money to buy a car? Father laughed, No, not because of money. Actually, he is one of the greatest scientists in the world. He can afford to buy a motorcade if he likes. He is just an environmentalist and usually doesn't drive unless going shopping, or in bad weather. In America, there are a lot of environmentalists, who actively protect their environment. For example, in Palo Alto city we are living now, there is even a bicycle-to-work day on May 19th every year to encourage people to decrease air pollution caused by cars. Later, I also learnt another interesting fact of environment protection there. In some states of America, in order to decrease air pollution, save energy and reduce traffic jams, state governments encourage people to take buses to work or to share a car among several people. They even set special diamond lanes in some main streets, which are only for the vehicles with 2 or more people. The positive actions of American people and the effective measures the American government takes in environment protection fully won my respects and deeply affected my consciousness in environment protection. When I was back in China, people often asked me: What do you think of America? I always bolt out: Wonderful, especially the beautiful environment. Frankly speaking, after several years, the faces of my American teachers and friends have gradually faded away from my mind, but the blue sky, green grass and lovely animals in California often arise in my mind, and became my dream of visiting there again. The 2008 Olympics provide us with the opportunity to publicize and practise environment protection in Beijing. Is it possible for Beijing to Is it possible for Beijing to become as beautiful as California? The answer is yes, but the dream needs every Beijing citizen's full support and active moves to accomplish. From now on, if every student who is driven to school can take bus or ride bicycle to school once a week, if every car owner goes to work in a car pool once a week, we can make a difference. If everyone can actively protect the environment in our daily life, the blue sky, green grass and lovely animals in California will appear in Beijing. Tiny streams can combine into a vast ocean, small trees can together be an immense forest. Beijing is often described as a beautiful and aged picture. If every Beijing citizen adds a trait of green on the picture, the whole Beijing will become an ocean of green. Let us unite together to win the competition of environment protection in Beijing, and present the world a big gold medal. That is Green Beijing, Great Olympics
求一篇关于爱因斯坦的爱情故事的英文演讲稿 800字左右
爱因斯坦(Albert Einstein，1879-1955)，举世闻名的德裔美国科学家，现代物理学的开创者和奠基人。
爱因斯坦1900年毕业于苏黎士工业大学，1909年开始在大学任教，1914年任威廉皇家物理研究所所长兼柏林大学教授。
后被迫移居美国，1940年入美国籍。
十九世纪末期是物理学的变革时期，爱因斯坦从实验事实出发，从新考查了物理学的基本概念，在理论上作出了根本性的突破。
他的一些成就大大推动了天文学的发展。
他的量子理论对天体物理学、特别是理论天体物理学都有很大的影响。
理论天体物理学的第一个成熟的方面——恒星大气理论，就是在量子理论和辐射理论的基础上建立起来的。
爱因斯坦的狭义相对论成功地揭示了能量与质量之间的关系，解决了长期存在的恒星能源来源的难题。
近年来发现越来越多的高能物理现象，狭义相对论已成为解释这种现象的一种最基本的理论工具。
其广义相对论也解决了一个天文学上多年的不解之谜，并推断出后来被验证了的光线弯曲现象，还成为后来许多天文概念的理论基础。
爱因斯坦对天文学最大的贡献莫过于他的宇宙学理论。
他创立了相对论宇宙学，建立了静态有限无边的自洽的动力学宇宙模型，并引进了宇宙学原理、弯曲空间等新概念，大大推动了现代天文学的发展。
我感觉还是在网站里找比较好,因为网页里的内容很丰富,并且很全面.很容易找到自己想要找的东西. 参考资料：爱因斯坦简介韦伯先生的慧眼 爱因斯坦十六岁时报考瑞士苏黎世的联邦工业大学工程系，可是入学考试却告以失败。
看过他的数学和物理考卷的该校物理学家韦伯先生却慧眼识英才，称赞他：“你是个很聪明的孩子
宇宙现象短演讲稿
朋友们：当人类第一次离开地球,在太空遥望自己的家乡时,人们这才惊讶地发现,在目前星体中,唯有我们人类的家园——地球,才是一颗蔚蓝色的星球.生命意味着蔚蓝,而蔚蓝意味着生命；使地球上的一切生命能够得以生存的大气和水,也使我们的地球成为一颗蔚蓝色的星体,一颗充满生命的星体.不过,大自然在人类面前,有时也会变的光怪陆离,越来越难以驾驭了.从的暴风雪到孟加拉平原的大洪水,从席卷地中海沿岸的高温热流到持续多年不肯缓解的非洲高原的大面积干旱,地球仿佛在发疟疾似地颤抖,人类竟然也像倒退了一万年似的束手无策.如果说,人类受到大自然的威胁,这多少有点“无可奈何花落去”之哀叹；那么人类去“威胁”大自然,这岂不是莫大的罪过?曾经是中亚地区最大水域之一的湖,在本世纪70年代还是一个大湖,但是到了80年代,一湖汪汪之水已被可怕的满地鸟尸所代替,难怪找不到水!又如,被誉为“华北明珠”的白洋淀在1984年的春夏之际再次干涸,波光粼粼的水面从此不见,白洋淀底黄沙朝天.这种人为造成的后果,怎不叫人痛惜?在对大自然的索取与探索中,作为“”的人类,还未来得及欢庆自己的胜利,大自然就已经作出无情的报复.据某报记载：中国目前的沙漠约16万平方公里是人为造成的,目前正以平均每年1560平方公里的速度继续扩展,若不能加以控制,到2000年又会有7万平方公里的土地,相当于一个宁夏,将沦为不毛之地!这一现象怎不令人担忧,叫人着急?去年6月初,节目报道了一则消息：由于掠夺性的地下水开采,使北京、天津、唐山的地下水已经是十水九空了.其中辽河平原已开采了近三分之一,黄河平原近二分之一,海河平原更高达十分之九.结果导致地面沉降,水质恶化,咸水面上升,地下水枯竭,这个警钟使多少蒙在鼓里的人幡然醒悟.请大家想想,我们究竟要给后代留下什么?中国人太相信“柳暗花明”了,即使“山穷水尽”也不觉可怕,只是到下一个危机来临时,就容不得人们再盲目乐观了：空气、大气、河水的污染,贫氧、臭氧层的破坏和.几年前联合国一个环保监测组,带一套仪器到中国检查,在北京机场下机后打开仪器一看,指针已到污染最高数字的尽头,超出最大测量能力,仪器失灵了!难怪北京奥申委把治理首都空气污染作为头等大事来抓.这个世界,可能没有什么东西比空气更重要了,可中国的许多城镇,特别是工业集中区,长期烟雾弥漫,真是“黑龙天上舞,黑雨头顶下”,迫使人们发出内心的呐喊：“还我蓝天,还我红日!” 无独有偶.举世闻名的长江,是中华民族灿烂文化的象征.一部电视系列片,以它豪迈的气势描绘出波澜壮阔、汹涌澎湃壮美的长江画景,在人们的心中唤起多少美好的回忆……而今天的长江却不能不让人担忧了,长江边上的某市造纸厂的污水瀑布般倾出,黑乎乎的污水泡沫铺满一江,过往的轮船乘客纷纷掩鼻锁眉,长江的很多港口,江面全都蒙上尘埃和煤屑.如果李白、杜甫再世畅游长江一定会不解,一腔诗兴从何发起?或者的诗该会写成：“一道残阳铺水中,半江乌黑半江浊”.“只有一个地球”,这是1972年在斯德哥尔摩召开的人类环境会议上提出的一个响亮口号,去年世界的“环发”会议,各国首脑再次呼吁人们注意：人类“只有一个地球”.朋友们,听到这里,大家应该猛醒了：“保护环境,人人有责”!再不要让大量的森林被砍伐,植被遭破坏,水土遭流失.地球,美好的家园,谁不想那蔚蓝色的海风化为雨水,重新滋润那片干涸的湖泊和干裂的土地,谁不想那清新的空气迎面吹拂,叠翠的山峦、明净的河水、蔚蓝的天空永远向人类展示勃勃生机.自古以来,从夏禹治水到今天三峡工程的筹建,从女娲补天到营造绿色长城,这一切无不体现了中国人民保护大自然、改造大自然的雄心大略.朋友们,我们也应该踊跃加入“环保”的行列,积极行动起来,为让那一片蓝天永远保持蔚蓝,让大自然的森林永远郁郁葱葱,让碧波荡漾的河水永远明净……努力吧!朋友们,让我们都永远记住：人类,仅有一个地球!以地球的角度写的,以第一人称痛斥人类不爱惜“自己”,再将从前的“自己”和现在的“自己”对比的嘛……可以自己修改哦!如还有新的问题,请以追问的形式发送,
有关太空的演讲稿
中国，从壁画到的筋斗云，飞天一直是中华祖祖辈辈的梦想。
是梦就有实现的一天，有梦才有成功。
那天的夜晚，梦想成真了——神七飞天。
“10——9——8——7——6——5——4——3——2——1——点火
”这声音回荡在中国的时空，回想在中国人的耳朵里，激动在中国人的心里。
2008年9月25日9点10分，在，我国用了神舟七号宇宙飞船。
人们在梦里才能看到的事情，而今被中国人民变成了现实。
啊，我们做到了，我们真行，我为神七骄傲，我为中国自豪。
中国的的宇宙飞船，从神一到神六，中国都发射成功了。
而神七与众不同，它实现了太空行走，把我国的宇宙航天事业推动到第二步战略的起点，具有深远的里程碑意义。
在9月27日下午4时三十多分到5事左右，我国宇航员完成了太空行走。
在舱外，他挥动着五星红旗，无比自豪，还从飞船外部取下了太空润滑材料试验装置，交给另一个宇航员拿回舱里。
又过了一会儿，手把着飞船外部的把手作了很多动作。
太空行走，为我国以后在太空建立空间站打下了基础。
看着这些情景，我的心里无比的激动，是啊，中国宇航员在飞船上的一小步就是中国人的一大步。
9月28日下午五点多钟，的返回舱在我国内蒙古卫星回收场顺利着陆，三名宇航员神采奕奕地从舱内走了出来。
至此，神七飞天取得了圆满成功。
看着祖国航天及时不断进步，使我情不自禁地唱起了国歌，看着离我家不远的校园里飘扬的国旗，我的爱国之情油然而生，中国，我的祖国，我为你骄傲；神七，神奇，我为你歌唱。
中国的栽人航天事业的第一步已经圆满成功；由于神七，第二步也迈出了坚实的步伐。
接着，我们还要建设空间站，在空间站里进行科学试验，还要有人长期住在空间站里；第三步是实现宇航员登月，进一步了解月球，利用月球资源，为地球上的人类作出贡献，为人类的发展进行进一步的探究。
完全实现以后，我们还要了解火星、金星、水星等更多的星球，让宇宙万物共享人类智慧的结晶。
虽然说中国是第三个实现太空行走的国家，但是我坚信未来的中国人民会成为地球的主人。
为此，神七在太空飞翔，我心在祖国飞扬。
