四级考试阅读主旨题解题技巧实战终极版
Unless life comes and visit us, the only way we likely to know of its existence is from radio message. Listening for intelligent extraterrestrial or E.T. life is not a new idea, but the techniques now being used offer a much better chance off success than before. Looking for evidence of life in other solar systems now means using special radio receivers called radio telescopes to listen out for message. The idea is that intelligent forms of life would have discovered radio waves and would, like us, be using them to communicate.
Through its research work, NASA has develop two means of systematically searching for E.T. life. The first method is to select the closest 800 stars like our sun and to direct a radio telescope to scan each of one them for electromagnetic wave. The second way is to survey the entire sky, listening for continuous signals which may come from extraterrestrial life. Scientists are looking in the 100-10,000 MegaHetz frequency rangea range where there are fewer natural radio signals which could interfere with transmission . By looking signals in these specific regions, scientists can avoid any confusion that might be caused by receiving a natural radio signal rather than one sent by intelligent life.
NASAs search in space has already resulted in some discoveries including new equipment which may help in the development of new communication and medical technologies.
All this, as well as the chance of discovering, has made us feel confident that maybe we are not alone in the universe!
【四级考试阅读主旨题解题技巧实战终极版】相关文章：
四级阅读解题技巧07-23
考研英语一：阅读B新题型实战解题技巧06-26
四级阅读解题技巧介绍03-31
四级阅读题技巧07-24
四级阅读信息匹配题技巧04-01
四级考试长篇的阅读技巧06-07
大学四级考试阅读理解技巧04-01
四级考试阅读理解有效技巧07-24
四级阅读选词填空题的技巧03-31