Passage 8 (8/63)-T9

ssl507

我也搞不懂，期待解答

ylzheng

我觉得是问题中有个was， 表示以前的方法是什么？

ruru8ruru8

同意楼上题目中有「was」，

所以是问过去的方法，因此答案是C。

lupisces

以下是引用ruru8ruru8在2008-7-11 9:08:00的发言：

同意楼上题目中有「was」，

所以是问过去的方法，因此答案是C。

同意

确实是定位问题，就这么个词。。

这个establish the properties 和 its actual detection有点像，只是有点。。呵呵

天蝎座1107

以下是引用ruru8ruru8在2008/7/11 9:08:00的发言：

同意楼上题目中有「was」，

所以是问过去的方法，因此答案是C。

说的很赞 一语惊醒梦中人!!!!!!!

9.    According to the passage, one of the methods used to establish the properties [l1] of neutrinos was

(A) detection of
    photon  无关

(B) observation of the interaction of neutrinos with gamma rays  无关

(C) observation of neutrinos that were artificially created

(D) measurement of neutrinos that interacted with particles of seawater（C）

(E) experiments with electromagnetic radiation  无关

想再说说D错误的原因 请看高亮部分:

Fortunately, a group of astrophysicists has proposed a means of detecting cosmic neutrinos by harnessing the mass of the ocean. Named DUMAND, for Deep Underwater Muon (muon: n. μ介子) and Neutrino Detector, the project calls for placing an array of light sensors at a depth of five kilometers under the ocean surface. The detecting medium is the seawater itself: when a neutrino interacts with a particle in an atom of seawater, the result is a cascade of electrically charged particles and a flash of light that can be detected by the sensors. The five kilometers of seawater above the sensors will shield them from the interfering effects of other high-energy particles raining down through the atmosphere.

作者已经说了 是has proposed a means 但是并没有说这个means已经使用了 并没有已经用来measurement了 再看后面说when...the result is...当...的时候，结果是...而不是说已经做过这个事情了

这几天总结阅读有一点体会很深 就是作者的语气 如果作者说sth. could worsen the environment in the future那么答案中经常后悔有迷惑选项说sth. caused damage to environment这是不对的 因为作者根本没有陈述出这个事情已经发生了 只是说could

我感觉和这个题的D有点类似

[此贴子已经被作者于2009/7/24 16:26:21编辑过]

天蝎座1107

第九题题干中的properties就是characteristics的意思 就是N的特点

然而当我回过头来再读文章的时候豁然明白 下面的高亮部分不就是N的特点么!!! 第一，它rarely与别的东西作用；第二，它还会带回information 那么第九题问的是这两个properties是怎么被发现的？那么第二段就告诉你是这样的:But how can scientists detect a particle that interacts so infrequently with other matter? Twenty-five years passed between Pauli’s hypothesis that the neutrino existed and its actual detection: since then virtually all research with neutrinos has been with neutrinos created artificially in large particle accelerators and studied under neutrino microscopes.

Virtually everything astronomers known about objects outside the solar system is based on the detection of photons—quanta of electromagnetic radiation. (看到这个virtually就要anticipate可能作者说的是一个普遍情况下面就要开始转折了，果然yet)Yet there is another form of radiation that permeates the universe: neutrinos. (看到这里马上anticipate作者是不是要讲它的特点了，作者为什么要提出这个neutrinos呢，肯定是它有什么特别之处，期待中，往下看，果然特别)第一With (as its name implies) no electric charge, and negligible mass, the neutrino interacts with other particles so rarely that 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Furthermore, neutrinos carry with them information 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 universe.

kevin512813

以下是引用ruru8ruru8在2008/7/11 9:08:00的发言：
同意楼上题目中有「was」，
所以是问过去的方法，因此答案是C。

说的很赞 一语惊醒梦中人!!!!!!!

9.    According to the passage, one of the methods used to establish the properties [l1] of neutrinos was



(A) detection of
   photon  无关
(B) observation of the interaction of neutrinos with gamma rays  无关



(C) observation of neutrinos that were artificially created
(D) measurement of neutrinos that interacted with particles of seawater（C）



(E) experiments with electromagnetic radiation  无关




想再说说D错误的原因 请看高亮部分:Fortunately, a group of astrophysicists has proposed a means of detecting cosmic neutrinos by harnessing the mass of the ocean. Named DUMAND, for Deep Underwater Muon (muon: n. μ介子) and Neutrino Detector, the project calls for placing an array of light sensors at a depth of five kilometers under the ocean surface. The detecting medium is the seawater itself: when a neutrino interacts with a particle in an atom of seawater, the result is a cascade of electrically charged particles and a flash of light that can be detected by the sensors. The five kilometers of seawater above the sensors will shield them from the interfering effects of other high-energy particles raining down through the atmosphere.
作者已经说了 是has proposed a means 但是并没有说这个means已经使用了 并没有已经用来measurement了 再看后面说when...the result is...当...的时候，结果是...而不是说已经做过这个事情了

这几天总结阅读有一点体会很深 就是作者的语气 如果作者说sth. could worsen the environment in the future那么答案中经常后悔有迷惑选项说sth. caused damage to environment这是不对的 因为作者根本没有陈述出这个事情已经发生了 只是说could
我感觉和这个题的D有点类似

[此贴子已经被作者于2009/7/24 16:26:21编辑过]

-- by 会员 天蝎座1107 (2009/7/24 16:25:00)

顶天蝎座！

清欢淡喜

顶老帖，，XDF补充材料的分析太少了= =
我觉得题干中USED TO也值得注意

honeydd

No apparatus can detect neutrinos unless it is extremely massive, because great mass is synonymous with huge numbers of nucleons (neutrons and protons), and the more massive the detector, the greater the probability of one of its nucleon’s reacting with a neutrino.
这句话中的detector怎么理解？and 之后的半句理解不了了

太阳雄师

No apparatus can detect neutrinos unless it is extremely massive, because great mass is synonymous with huge numbers of nucleons (neutrons and protons), and the more massive the detector, the greater the probability of one of its nucleon’s reacting with a neutrino.
这句话中的detector怎么理解？and 之后的半句理解不了了

-- by 会员 honeydd (2010/10/8 5:29:02)

这个detector应该是容器吧。and 之后的句子探测器容积越大，核子和中微子反应的可能性也越大吧。