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GRE阅读模拟在线练习附答案八十九

2018-07-11 16:05:00来源：网络

　　为了辅助大家更好地备考GRE阅读考试，新东方在线整理了一些模拟练习题供大家练习，这样能够帮助大家更好地理解阅读考试内容，辅助大家熟练的掌握解题的技巧等等。详细的内容如下：

点击查看》》》【GRE阅读真题在线练习附答案汇总】

　　In 1998 scientists using the neutrino detector in Kamioka, Japan, were able to observe several thousand neutrinos—elusive, tiny subatomic particles moving at nearly the speed of light and passing through almost everything in their path. The Kamioka find- ings have potentially far-reaching ramifications. They strongly suggest that the neu-trino has mass, albeit an infinitesimal amount. Even a tiny mass means that neutrinos would outweigh all the universe's visible matter, because of their vast numbers. The findings also suggest that a given neutrino does not have one stable mass or one stable identity; instead it oscillates from one identity or “flavor” (physicists' term describing how neutrinos interact with other particles) to another. This oscillation may explain why, although the Sun is a large source of neutrinos, detectors capture far fewer solar neutrinos than the best theory of solar physics predicts: the neutrinos may be changing to flavors undetectable by detectors. Finally, while the standard particle-physics model—which describes all matter in terms of twelve fundamental particles and four fundamental forces—does not allow for neutrinos with mass, there are theories that do. Further experiments to confirm that neutrinos have mass could help physicists determine which, if any, of these theories is correct.

　　The primary purpose of the passage is to

　　A.evaluate the merits of a particular theory in light of new evidence

　　B.discuss scientists'inability to account for certain unexpected

　　C.discoveries C point out certain shortcomings in a long-standing theory

　　D.compare several alternative explanations for a particular phenomenon

　　E.consider some implications of certain scientific findings

　　正确答案:E

　　以上就是关于“GRE阅读模拟在线练习附答案八十九”的内容，更多精彩内容，请关注GRE频道!


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