有关外星人

nullnull有关外星人有关外星人  外星人和地外文明始终是人们最有兴味的话题。那些一直致力于寻找外太空智慧生命的科学家相信，外星人确实存在，只是人类一直无法找到他们。科学家认为，由于天文物理技术等因素的限制，靠星际旅行来寻找地外生命是不大现实的，与外星人交流的唯一途径可能只有无线电通讯。     25年内找到外星生命     最近，正在澳洲出席外星生物研究会议的美国“外星生物情报研究所”（SET1）的高级太空科学家萧斯塔克透露，由于新科技的帮助，科学家可望在未来25年内，在外太空找出其中一个星体上的生物。     该研究所自1984年成立以来，就开始监察无线电讯号，希望能探测到来自外太空发出的讯号。他们开展了著名的“凤凰”。到1999年中期，凤凰计划已观测了大约500颗星体，但始终没有地外文明信息被监测到。萧斯塔克说，“我们确实经常监测到信号，可经查实都是人类而不是外星人发出的，大部分是美国电话电报公司的。”萧斯塔克透露，研究所在赞助下将斥资2600万美元，研制一组射电望远镜阵。这组望远镜叫做“艾伦望远镜”。艾伦望远镜阵将覆盖1000到10000MHz的频率，预备在2005年投入使用。该望远镜阵将建于旧金山市东北的哈特克里克气象台，可以全年不停地侦察附近10万甚至100万颗星体。萧斯塔克说，不能期望外星人与我们在电影中见到的相近，但推测他们也会有中央思维系统，眼睛、嘴巴和腿，也会繁殖，他们可能比人类聪明得多。 nullnullnullnullnullnull有关外星人的一些图片有关外星人的一些图片Key Words and phrasesKey Words and phrasesKey Words 1. UFO 2. bathroom 3.bedroom 4.kitchen 5. barber 6. cut 7. alien 8. land 9. shirt 10.while 11. got 12. bought Key Phrases 1. in the bathroom 2. in the kitchen 3. in front of 4. barber shop 5. get out 6.take offKey sentencesKey sentences1a.—Where were you when the UFO arrived? ---I was in my bedroom. 1b.—What were you doing when the UFO arrived? --I was standing in front of the library. 1c.---What was he /she doing when the UFO arrived? ---He was sleeping late when it arrived.Grammar FocusGrammar Focus1.The boy was walking down the street when the UFO landed. 2. While the boy was walking down the street, the UFO landed. 3. The girl was shopping when the alien got out. 4. While the girl was shopping, the alien got out.有关一般过去时有关一般过去时1.概念: 示过去发生的动作行为或存在的状态. 2.特点:用这种时态的句子都有一个明确的过去时间状语或联系上下文能确切知道动作发生在过去. 3.公式:主语+动词过去式+宾语+时间状语 否定句:主语+didn’t+动词原形+宾语+时间状语 一般疑问句:Did+主语+动词原形+宾语+时间状语 4.指示词: ago, yesterday, last week, in 1990等. 练习题练习题1.昨天下午,我和玛丽去看电影. Mary and I went to see the movies yesterday afternoon. 2.上周,妈妈带我去动物园. Mother took me to the zoo last week. 3.昨天晚上,我和我最好的朋友争吵. I argued with my best friend last night. 4.十年前,他们来到漳州. They came to zhangzhou ten years ago. 5.这对双胞胎出生于1992年. The twins were born in 1992.有关过去进行时有关过去进行时1.概念:表示过去某个时刻或过去一段时间正在进行的动作. 2.公式:主语+was/were+doing sth +时间状语 3.指示词:then, at that time, once, a moment ago等连用,或者用另一动作来表示过去的时间.练习题练习题1.昨天早上9点钟你在干什么? What were you doing at 9 o’clock yesterday morning. 2.当李雷在吃早饭时,吉姆进来了. While LiLei was having breakfast, Jim came in. 3.不明飞行物起飞时,小明正在骑自行车. XiaoMing was riding his bike when the UFO took off. 4.那时,他们正在做家庭作业. They were doing their homework at that time. 5. 刚才,我们正在电话上交谈. We were talking on the phone a moment. 将下面故事排序将下面故事排序A. Mary got up at seven o’clock. B. And then she was doing her homework while her mom was cleaning the room. C. After breakfast, she began to study for the tests. D. When her mom made breakfast, she was listening to English. E. At last, Mary and her mom decided to go shopping in the afternoon. (Answers: A D C B E)