fawo四人小组备考贴！GRE, we're gonna kick your ass!!!

far2goUID：3568511

无敌浩克One 发表于 2015-5-29 19:21
我和你正好相反，理工科的看不懂，因为不明白谁和谁反应啊之类的，啊啊啊！！！！！！！我高中也是理科生 ...

我都不太懂。。只不过不懂的程度文科更凄惨一点。。不知道还有没救

far2goUID：3568511

stars can be far enough from Earth to be obscured even by very sparsely distributed matter
为什么这个的解释是 一些星星离地球太远了，即使很小的物质也会遮住他（以致人们看不见）
否定的意思是哪来的？ far from的话不是 far from doing 才是not的意思吗？

wfxmfwjwUID：3582171

far2go 发表于 2015-5-29 21:03
stars can be far enough from Earth to be obscured even by very sparsely distributed matter
为什么这 ...

哪里有否定？sparsely  enough
星星可以离地球足够远到即使很小的物质也会遮住他。

far2goUID：3568511

wfxmfwjw 发表于 2015-5-29 21:43
哪里有否定？sparsely  enough
星星可以离地球足够远到即使很小的物质也会遮住他。

。。我把obscure 看成observe了

艾小卉UID：3484633

本周小结：
      
                1. 红宝书核心词汇达标率70%，拓展词汇还要加强
                2. 2篇argument, 1篇issue   语言表述问题较多，思路拓展不开
                3. 花了大概一天左右了解了一下学校信息，但也浪费了一点时间。等课程论文写完，下阶段开始攻阅读和填空。

无敌浩克OneUID：3605802

Classical physics defines the vacuum as a state of absence: a vacuum is said to exist in a region of space if there is nothing in it. In the quantum field theories that describe the physics of elementary particles, the vacuum becomes somewhat more complicated. Even in empty space, particles can appear spontaneously as a result of fluctuations of the vacuum. For example, an electron and a positron, or antielectron, can be created out of the void. Particles created in this way have only a fleeting existence; they are annihilated almost as soon as they appear, and their presence can never be detected directly. They are called virtual particles in order to distinguish them from real particles, whose lifetimes are not constrained in the same way, and which can be detected. Thus it is still possible to define that vacuum as a space that has no real particles in it.
One might expect that the vacuum would always be the state of lowest possible energy for a given region of space. If an area is initially empty and a real particle is put into it, the total energy, it seems, should be raised by at least the energy equivalent of the mass of the added particle. A surprising result of some recent theoretical investigations is that this assumption is not invariably true. There are conditions under which the introduction of a real particle of finite mass into an empty region of space can reduce the total energy. If the reduction in energy is great enough, an electron and a positron will be spontaneously created. Under these conditions the electron and positron are not a result of vacuum fluctuations but are real particles, which exist indefinitely and can be detected. In other words, under these conditions the vacuum is an unstable state and can decay into a state of lower energy; i.e., one in which real particles are created.
The essential condition for the decay of the vacuum is the presence of an intense electric field. As a result of the decay of the vacuum, the space permeated by such a field can be said to acquire an electric charge, and it can be called a charged vacuum. The particles that materialize in the space make the charge manifest. An electric field of sufficient intensity to create a charged vacuum is likely to be found in only one place: in the immediate vicinity of a superheavy atomic nucleus, one with about twice as many protons as the heaviest natural nuclei known. A nucleus that large cannot be stable, but it might be possible to assemble one next to a vacuum for long enough to observe the decay of the vacuum. Experiments attempting to achieve this are now under way.

18.        According to the passage, the assumption that the introduction of a real particle into a vacuum raises the total energy of that region of space has been cast into doubt by which of the following?
(A) Findings from laboratory experiments
(B) Findings from observational field experiments
(C) Accidental observations made during other experiments
(D) Discovery of several erroneous propositions in accepted theories
(E) Predictions based on theoretical work

这个题目对应原文第二段，A surprising result of some recent theoretical investigations is that this assumption is not invariably true.
result 难道不是findings吗？为什么答案认为是predictions？抓狂

无敌浩克OneUID：3605802

wfxmfwjw 发表于 2015-5-29 16:36
NO3-1 SB

During adolescence, the development of political ideology becomes apparent in the indivi ...

这篇太变态了，我和你错的一样，25题我也没弄明白，你发到论坛里求助更多的大神吧T_T

PS24感觉应该对应第一段最后，要有这些能力才能形成ideology，child没有，所有要求了这些能力的东西child会觉得难，但是这几个选项都什么意思啊→_→

wfxmfwjwUID：3582171

做了一下官方150的阅读，感觉之前阅读都白做了，
基本上第一遍做不对题目啊，被自己蠢哭了！！！

艾小卉UID：3484633

wfxmfwjw 发表于 2015-6-1 15:46
做了一下官方150的阅读，感觉之前阅读都白做了，
基本上第一遍做不对题目啊，被自己蠢哭了！！！

现在做150是不是早了？那个我准备留到考前两周。你之前阅读做的多吗？

logicallyUID：3447866

无敌浩克One 发表于 2015-5-30 12:49
这篇太变态了，我和你错的一样，25题我也没弄明白，你发到论坛里求助更多的大神吧T_T

PS24感觉应该对应 ...

你定下来什么时候考试没？

wfxmfwjwUID：3582171

艾小卉 发表于 2015-6-1 19:38
现在做150是不是早了？那个我准备留到考前两周。你之前阅读做的多吗？

做了老g的题目后想试一下，就做了几篇，结果错得惨不忍睹，
感觉150的难度一下就提升了很多，一下就做蒙了

艾小卉UID：3484633

wfxmfwjw 发表于 2015-06-01 23:17


做了老g的题目后想试一下，就做了几篇，结果错得惨不忍睹，
感觉150的难度一下就提升了很多，一下就做蒙了

老g有196篇>_<我一直觉得做那个就够了呢～～

wfxmfwjwUID：3582171

艾小卉 发表于 2015-6-1 23:40
老g有196篇>_

新g难了好多，伤心ing···

ally1213UID：2948121

无敌浩克One 发表于 2015-5-30 09:18
Classical physics defines the vacuum as a state of absence: a vacuum is said to exist in a region of ...

重点好像不是findings和predictions的区别。文中说了是"some recent theoretical investigations" 所以就不会是实验室里面的experiements

无敌浩克OneUID：3605802

ally1213 发表于 2015-6-2 04:47
重点好像不是findings和predictions的区别。文中说了是"some recent theoretical investigations" 所以就 ...

明白了！！！非常感谢！！！我得恶补一下理科类文章了，好多基本定义都不知道T_T