Unidentified Flying Object is any object or light, reportedly sighted in the sky, that cannot be immediately explained by the observer. Sightings of unusual flying objects date back to ancient times, but UFOs became widely discussed only after the first widely publicized U.S. sighting in 1947. Many thousands of such observations have since been reported worldwide.
At least 90 percent of UFO sightings can be identified as conventional objects, although time-consuming investigations are often necessary for such identification. The objects most often mistaken for UFOs are bright planets and stars, aircraft, birds, balloons, kites, aerial flares, peculiar clouds , meteors, and satellites. The remaining sightings most likely can be attributed to other mistaken sightings or to inaccurate reporting, tricks, or delusions, although to disprove all claims made about UFOs is impossible.
From 1947 to 1969 the U.S. Air Force investigated UFOs as a possible threat to national security. A total of 12,618 reports were received, of which 701 reports, or 5.6 percent, were listed as unexplained. The air force concluded that no UFO reported, investigated, and evaluated by the Air Force has ever given any indication of threat to our national security. Since 1969 no agency of the U.S. government has had any active program of UFO investigation.
Some persons, however, believe that UFOs are extraterrestrial spacecraft, even though no scientifically valid evidence supports that belief. The possibility of extraterrestrial civilizations is not the stumbling block; most scientists grant that intelligent life may well exist elsewhere in the universe. A fully convincing UFO photograph has yet to be taken, however, and the scientific method requires that highly speculative explanations should not be adopted unless all of the more ordinary explanations can be ruled out.
Called Maglev for short, the system under discussion makes use of a high-speed train levitated above a guideway and propelled by magnetic fields. The project has been in the talking stage for several months.
Hans Ueberschaer, Germans ambassador visited the city together with Harmut Heine, representative of Thyssen Krupp. They had an initial discussion with the mayor there about the prospect of the project. The talks were believed to be constructive and paved the way for the future talks in Berlin, where a commitment was reached.
Sources familiar with the talks estimated that the project would cost US$723 million, which would cover everything from land use fees and rail construction to train cars. Completion date is 2005. A joint venture company is to be established for the project.
EXERCISE:
1. Who paved the way for further negotiations in Berlin?
A) The mayor
B) Both the German ambassador and the mayor.
C) The German ambassador.
D) The representative from the German company.
2. What was the signed commitment mainly about?
A) Finalizing the payment of US$723 million.
B) Establishing a joint venture company.
C) Conducting a feasibility study.
D) Outlining the German companys intention to export its technology.
3. What is the main feature of Maglev?
A) The Maglev train floats above the guideway and zip to its destination.
B) The Maglev train zips to its destination on the railway.
C) The Maglev train zips to its destination on a double guideway.
D) The Maglev train can carry more passengers than the electric train.
4. How large will be the success rate of the agreement signed by the two business parties according to the passage?
A) It is very likely that the city will have a German-built Maglev line.
B) It is very likely that Krupp will ban the export of its technology.
C) It is very likely that the city cannot afford the high payment.
D) It is very likely that the city will turn to buy US technology.
5. What type of writing do you think this passage belongs to?
A) An article on popular science.
B) An article taken from a transportation book.
C) A commercial contract.
D) A news report.
KEY: B C A A D
湖南衡阳八中2011届高三第三次月考试题(英语)
2010年北京市平谷区中考英语模拟试题及答案
高三英语第一轮复习unit 3课件
云南省曲靖一中高三英语高考冲刺卷(七)
高考英语完形填空复习指导
高中英语第五册Ut2Crossing limits同步试题
冀教版七年级英语上册Unit 1单元教案
牛津版七年级英语上册英预备课教案
2010年上海市浦东新区中考英语一模考试题及答案
高三英语Unit 4 Feed the World课件
高三英语语法 定语从句课件
2011年甘肃省高三英语二模试题及答案
北师大高中英语必修一Unit1 Lifestyles课件
2010年北京中考一模英语预测试题及答案(一)
2010年北京市宣武区中考英语一模试题及答案
冀教版七年级英语上Unit 1 Lesson 7 教案
2010年广东省汕头市中考英语模拟试题及答案
冀教版七年级英语上册Unit 1 Lesson 3 - 4教案
高中英语语法 名词性从句课件
新疆克拉玛依高一英语期中考试题及答案
上海市2010届初三年级英语中考模拟试卷(一)
2010年怀化市第一中学中考英语模拟试题及答案
高三英语语法 主谓一致课件
冀教版七年级英语上册unit2 lesson9教案
2010年北京市丰台中考英语一模试题及答案
2010年北京市西城区中考英语一模试题及答案
全国高三大联考英语试卷
2010年北京中考英语仿真模拟试卷及答案
2010年湖南省怀化市第一中学中考英语模拟试题及答案
高一英语必修二课件Unit2 The Olympic Games warming up
| 不限 |
| 英语教案 |
| 英语课件 |
| 英语试题 |
| 不限 |
| 不限 |
| 上册 |
| 下册 |
| 不限 |