地理课代表演讲稿
各位老师同学，地理是一门研究自然和人文的学科，学好地理能使我们开阔视野，了解我们所居住的地球。
我从小就对地理充满着浓厚的兴趣，对我们的地球充满着好奇，我喜欢的科学家竺可桢就是一名杰出的地理学家。
这次我参与竞争地理课代表就是想很好的学好地理这么学科，而且也想帮助咱班的同学学好它。
如果我当选了地理课代表，我一定协调好老师和同学之间的关系，按时收交作业，对同学感兴趣的问题及时反馈给老师，让同学和老师之间互动起来，给咱班带动起一股浓厚的学习地理的气氛。
希望老师和同学给我这次机会，我一定不会让大家失望的，谢谢大家
以“我的理想”为主题的英语演讲稿
急求，满意的追加30分
我的理想是当一个发明家。
我要发明一个机器人，他几乎什么事情都能做，他可以帮妈妈做家务，陪小朋友玩耍，有时还会帮学生们解决难题。
我想只要我努力学习，我的理想一定能成为现实。
To be an inventor is my ideal. I will invent a robot. He can do almost everything. He can help mothers do housework, play with children and sometimes help students solve difficult problems. I believe that as long as I study hard, my ideal will certainly come true.第二篇My ideal is to be a teacher I want to be a teacher when I grow up. Why? I really like this job. If I am a teacher, I will try my best to teach my students. First, I will make my students eelaxed, and I won't let them do a lot of homework. I will try my best ot let them feel happy in study. And I will encourage my students to have their own ideas. Above all, I will give them enough time to think. I believe I will be a famous teacher and my students will all love me. 第三篇 初中英语作文：我的理想A piano playerWhat do I want to do when I’m older? Someone wants to be a doctor. Someone wants to be a basketball player because they are good at sport. Someone wants to be a writer and to make the writing. Someone wants to be a teacher because they like teaching children. I like playing the piano and I good at it. So I want to become a piano player. Play the piano is very interesting. And you can learn something of music. Piano can make you like music. A lot of musician and singer are love playing piano. I play the piano when I’m ten years old. Now I’m in grand five. I hope when I’m sixteen years old , I can become grand eight. I’ll be harder and harder to practise. Become a piano play is a hard job. But I believe I can do it.
求一篇英语演讲稿
TED里面的演讲就足够你提高好几个档次了，里面的视频演讲短的3分钟，长的20分钟。
之前我也选择了各方面的学习资料，最终我还是选择了TED，一方面开拓了眼界，感觉自己像井底之蛙，另一方面我觉得如获至宝，浓厚的兴趣被激起，动力十足。
我选择了比较适合听力、自己也比较喜欢的36篇文章（12篇一组），把文稿打印出来，疯狂的研究疯狂的听疯狂的读，慢的语速150词每分钟，快的达到220词每分钟，听起来完全没压力。
第一组我话的时间最多（3个月听烂），到了第二组第三组就快多了，平常走路、吃饭、睡觉都在听，我的目标是100篇TED
口语纠正的话看你想学什么
美音还是英音。
我强烈推荐
当然听说是分不开的，听力好的前提是自己对发音的掌控比较好，国内没有英语环境就自己制造英语环境吧，抓住一切可以开口的机会。
求个英语演讲稿...
Aging of the American Population America is growing older. Fifty years ago, only 4 out of every 100 people in the United States were 65 or older. Today, 10 out of every ]00 Americans are over 65. The aging of the population will affect American society in many ways - education, medicine, and business. The graying of America has made us a very different society ---one in which people have a quite different idea of what kind of behavior is suitable at various ages. A person's age no longer tells you anything about his or her social position, marriage or health. There's no longer a particular year in which one goes to school or goes to work or gets married or starts a family. The social clock that kept us on time and told us when to go to school, get a job, or stop working isn't as strong as it used to be. It doesn't surprise us to hear of a 29-year-old university president or a 35-year- old grandmother,or a 70-year-old man who has become a father for the first time. Public ideas are changing. Many people say,l am much younger than my mother or my father was at my age. No one says anymore, Act your age. We've stopped looking with surprise at older people who act in youthful ways.美国人口老龄化 美国正在变老。
5()年前，在美国每10()个人里面只有4个人在65岁或65岁以上。
现在每100个美国人中有10个超过了65岁。
人口老化将会在许多方面影响美国社会 —教育。
医药和商业。
美国变老已经使我们成为一个极为不同的社会 这个社会中人们对在不同的年龄适合做什么事情的观点也大相径庭。
一个人的年龄不再能够告诉你他或她的社会地位、婚姻以及健康状况。
人们上学，工作，结婚或者组建家庭也不再有确切的时间。
使我们按部就班、告诉我们何时上学、工作或退休的社会时钟也不再像从前那样强大。
我们听到29岁的大学校长，35岁的祖母或70岁才头次当上爸爸这样的消息时，也不会感到奇怪了。
公众的观点正在发生变化。
很多人都说：“我比我父母在我这个年龄时年轻得多。
”不会有人再说：“做与年纪相符的事情。
”我们已经不再以惊讶的目光注视老年人以年轻人的方式行事。
求一篇有关顺德地理、文化方面的英语介绍，最好500个单词左右。
Loulan's disappearance:Recently, LuoBuBo environment of scientific expedition team LuoBuBo drilling for the comprehensive system of environmental science. According to preliminary infer that sometime in the qinghai-tibet plateau, with seven to eight million years ago, the rapid uplift LuoBuBo bysouthing north migration, drying, resulting in increased gradually whole lakes dry. Such an explanation is not satisfactory, Chinese academy of sciences institute of geology and geophysics ZhouKun professor argues that, uncle LuoBuBo dry complex reasons. It is a global problem, and regional issues, besides natural causes, and human factors.A global climate is dry, the big backgroundHuman and neolithic in here, the Bronze Age here, then just value population prosperous period, the temperature LuoBuBo, environment. But then, after entering cooling zone, river water environment, lakes, desert expansion. At about 2000 BC, the performance of drought in north China area in loess accumulation, ice, lakes, retreat.The disappearance of the ancient lou-lan and about in the fourth century to the han dynasty to the north (central), then it intensifies the dry periods. In fact, the dry process, not only is the ancient lou-lan and desert expansion, and successively occur in kelatongke pier, hananiah, milan, soil, and integration of khan city of wancheng etc.Second, the qinghai-tibet plateau uplift is geographyBesides global climate change, the uplift of qinghai-tibet plateau is the most important cause of regional. In seven to eight million years ago, the rapid uplift of qinghai-tibet plateau. The uplift of northwest China's climate decisive role. LuoBuBo due to the geographical location is located in east Asia and the Pacific northwest inland, every year and the Indian Ocean warm air almost all rarely reach here.When the global climate change, the east west began to appear the drought and desertification, gobi tendency. During this period, LuoBuBo started from the south to the north. 7 million years ago, when the lake near lake to the last drop dramatically. Because of the uneven terrain lake, the ancient great unity of LuoBuBo decomposing now, and manasseh kelatongke lake, north of lake and LuoBuBo larger.In regional factors, there must be worthy of note, from the remote sensing data said recently, which had a big upstream of the landslide. The landslide whole blocked river channels, which was broken LuoBuBo of water. The question now is still don't know the exact time the landslide occurred in, whether it LuoBuBo dry before remains to study.Third, LuoBuBo accelerate human developmentHuman activities on the LuoBuBo dry effect, more recent in late may. Waste water and trees are the key oasis can survive. Loulan city was established in kongquehe downstream of the water resources, there was a growing HuYangShu exuberant the materials for the building. When people in LuoBuBo edge loulan diameters for 10 million square meters of loulan city, they cut off many trees and reed, it will undoubtedly on environment.In this period, human activities and the changes of water damage, make the war and the fragile worsening ecological environment. 5 the river churchyard density, root stump male who had felt loulan survival crisis, to pray tribe to bless his sons reproduction worship. But they cut the trees, already scarce has deteriorated to the local environment.The final LuoBuBo dry, and in the tarim river upstream of the liberation of our development. When we in tarim river upstream of the tarim river after water diversion, bills, appear to flow downstream. This point in recent years from the Yellow River dry-up can get by. No water supplies because of LuoBuBo also began shrinking, eventually finally die.（中文对照）楼兰的消失： 最近，中科院罗布泊环境钻探科学考察队对罗布泊进行了全面系统的环境科学考察。
考察队认为：据初步推断，随着青藏高原在距今7到8万年前的快速隆升，罗布泊由南向北迁移，干旱化逐步加剧，最后导致整个湖泊干涸。
这样的一个解释显然并不能让人满意，中国科学院地质与地球物理研究所的周昆叔教授则认为，罗布泊干涸的原因很复杂。
这里面既是全球性的问题，也是地域性的问题，除了自然方面的原因，还有人为方面的因素。
一、全球气候旱化是大背景 新石器时代人类便涉足这里，青铜器时代这里人口繁盛，这时恰值高温期，罗布泊湖面广阔，环境适宜。
但此后进入降温区后，水土环境变差，河水减少，湖泊缩减，沙漠扩大。
在距今约2000年左右旱化加剧，这表现在中国北方广大地区冰进发生，黄土堆积，湖沼消亡，海退发生。
楼兰古城的消亡大约在公元前后至四世纪(中原的汉朝到北魏时期)，这时正是旱化加剧的时期。
其实，在这一旱化过程中，不仅是楼兰古城消亡，而且由于沙漠扩大，先后发生尼雅、喀拉墩、米兰城、尼壤城、可汗城、统万城等的消亡。
二、青藏高原隆起是地域因素 除了全球气候的变化之外，青藏高原的隆起是地域性中最重要的原因。
在距今7到8万年前，青藏高原快速隆升。
这种隆起对中国西北部的气候具有决定性的作用。
由于罗布泊所处的地理位置位于东亚西北内陆，每年，太平洋和印度洋的暖湿气流几乎都很少到达这里。
当全球气候发生变化时，整个东亚西部都开始出现了干旱和沙漠化、戈壁化趋势。
在这期间，罗布泊开始从南向北推移。
在距今7万年左右的时候，湖面急剧下降到最后接近湖底。
因湖底地形的高低不平，原先巨大统一的古罗布泊分解成现在的台特玛湖、喀拉和顺湖和北面较大的罗布泊。
在地域性因素中，还有一点必须值得注意，据说从近来的遥感资料判断，孔雀河上游曾发生了一次大的滑坡事件。
这次滑坡整个堵塞了孔雀河的河流通道，致使罗布泊的来水被断。
现在的问题是还不知道这次滑坡的具体时间，它是否发生在罗布泊干涸之前还有待于研究。
三、人类过度开发加速罗布泊消亡 人类活动对罗布泊干涸的影响，在晚近期可以说越来越大。
水源和树木是荒原上绿洲能够存活的关键。
楼兰古城正建立在当时水系发达的孔雀河下游三角洲，这里曾有长势繁茂的胡杨树供其取材建设。
当年楼兰人在罗布泊边筑造了10多万平方米的楼兰古城，他们砍伐掉许多树木和芦苇，这无疑会对环境产生负作用。
在这期间，人类活动的加剧以及水系的变化和战争的破坏，使原本脆弱的生态环境进一步恶化。
5号小河墓地上密植的“男根树桩”说明，楼兰人当时已感到部落生存危机，只好祈求生殖崇拜来保佑其子孙繁衍下去。
但他们大量砍伐本已稀少的树木，使当地已经恶化的环境雪上加霜。
罗布泊的最终干涸，则与我们解放后在塔里木河上游的过度开发有关。
当年我们在塔里木河上游大量引水后，致使塔里木河河水入不敷出，下游出现断流。
这一点从近年来的黄河断流就可以得到印证。
罗布泊也由于没有来水补给，便开始迅速萎缩，终至最后消亡。
