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GRE阅读综合辅导:63题新东方网络课堂总结(二十九)
http://www.21tx.com 2008年09月28日

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Passage 8 问题解决型(中微子)
文章的引题:为什么要研究中微子,中微子的性质是什么Virtually everything astronomers known about objects outside the solar system is based on the detection of photons光子—quanta量子(单数:quantum) of electromagnetic电磁 radiation辐射. Yet(转折,上一句不用看) there is another form of radiation that permeates the universe: neutrinos微中子. 第一个性质:不跟人家发生反应With (as its name implies) no electric charge, and negligible mass, the neutrino interacts with other particles so rarely*6A*7E that(因果关系) a neutrino can cross the entire universe, even traversing substantial agGREgations of matter, without being absorbed or even deflected. Neutrinos can thus escape from regions of space where light and other kinds of electromagnetic radiation are blocked by matter. 第二个性质:身上携带宇宙信息Furthermore, neutrinos carry with them information*4D about the site and circumstances of their production: therefore, the detection of cosmic neutrinos could provide new information about a wide variety of cosmic phenomena and about the history of the

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