关于天文知识的演讲稿，急！！！！！

宇宙主要由大量星系星团构成,它有一百五十亿年的历史,它起源牙150亿年前的一次大爆炸(一个奇点)的目前仍在持续膨涨,科学家对它的未来提出两种猜想,一是弗里德曼闭合宇宙(即宇宙膨胀又收缩)二是不断膨胀它的边缘距地球距离超过200亿光年银河系是我们太阳系所在星系,直径10万光年左右,上下约长2万光年位于本超星系团边缘,属于涡旋星系,有人马座,猎户座,英仙座,3000秒差距旋臂,太阳系位于猎户座旋臂星座是人们根据想象将星星连接而成的恒星分为7类,分为O,B,A,F,G,K,M,R,S,N

随着时间的脚步，20世纪已逐渐离我们远去，伴随着点点滴滴细微的进步，我们迎来了21世纪。

讲讲人造卫星的发展史……重点突出神舟飞船的伟大。一句带过，然后说，让我们随着时间的步伐，一点一点亲近那浩瀚的宇宙吧。

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 worldwide

1、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, US 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

“能力越大，责任越大”——《蜘蛛侠》

“你是体育课跑的最慢的人，还是现今速度最快的人并不重要，大家都在奔跑，人活着就要奔跑，要逃离什么，要奔向什么，或者奔向某个人，无论你跑得有多快，也总有跑不过的东西，总有东西相当设法追上你”——《闪电侠》

漫威的英雄比较现实，在漫威的宇宙里即使超级英雄也有弱点和人格缺陷。

而DC宇宙中的英雄大多品德高尚，是我们为人处世的模范，所以说DC比较浪漫主义。