下面小编跟大家一起了解GRE逻辑单题练习题分享，希望对大家的学习有所帮助。
　　一、加强削弱题：加强的其中两种（共五种）方式就是取非反对或者重复举例
　　It can be inferred from the passage that the “first theories” of grazer control mentioned in line2would have been more convincing if researchers had been able to
　　(A) observe high phytoplankton numbers under natural lake conditions
　　(B) discover negative correlations between algae and zooplankton numbers from their field research
　　(C) understand the central importance of environmental factors in controlling the growth rates of phytoplankton
　　(D) make verifiable correlations of cause and effect between zooplankton and phytoplankton numbers
　　(E) invent laboratory techniques that would have allowed them to bypass their field research concerning grazer control
　　我们先找到对应段落及定位词
　　Many theories have been formulated to explain the role of grazers such as zooplankton in controlling the amount of planktonic algae (phytoplankton) in lakes.The first theoriesof such grazer control were merely based on observations of negative correlations between algal and zooplankton numbers. A low number of algal cells in the presence of a high number of grazers suggested,butdid not prove, that the grazers had removed most of the algae.
　　紧接着我们继续找出but，即为反对观点。
　　那么取非反对，文章说不能证明，取非那就是能证明，那不就是选项中的make verifiable correlations of cause and effect 吗，答案呼之欲出。
　　二、explain题：使矛盾合理化
　　Historically, a cornerstone of classical empiricism has been the notion that every true generalization must be confirmable by specific observations. In classical empiricism, the truth of “All balls are red,” for example, is assessed by inspecting balls; any observation of a nonred ball refutes unequivocally the proposed generalization.

　　For W. V. O. Quine, however, this constitutes an overly “narrow” conception of empiricism. “All balls are red,” he maintains, forms one strand within an entire web of statements (our knowledge); individual observations can be referred only to this web as a whole. As new observations are collected, he explains, they must be integrated into the web. Problems occur only if a contradiction develops between a new observation, say, “That ball is blue,” and the preexisting statements. In that case, he argues, anystatement or combination of statements (not merely the “offending” generalization, as in classical empiricism) can be altered to achieve the fundamental requirement, a system free of contradictions, even if, in some cases, the alteration consists of labeling the new observation a “hallucination.”
　　所有的explain题目目的无非就是free of contradiction
　　给大家举一个例子
　　The view to which line 18 refers serves to
　　(A) reconcile seemingly contradictory facts
　　(B) undermine a previously held theory
　　(C) take into account data previously held to be insignificant
　　(D) resolve a controversy
　　(E) question new methods of gathering data
　　我们依旧找到对应文章段落和view
　　Since around 50 percent of all stars are believed to begin their lives with masses greater than 1.4M⊙, we might expect that one out of every two stars would die as a supernova. But in fact, only one star in thirty dies such a violent death. The rest expire much more peacefully as planetary nebulas. Apparently most massive stars manage to lose sufficient material that their masses drop below the critical value of 1.4 M⊙before they exhaust their nuclear fuel.
　　Evidence supportingthis viewcomes from observations of IRC 10216, a pulsating giant star(a star of great luminosity and of large mass)located 700 light-years away from Earth. A huge rate of mass loss (1 M⊙every 10,000 years) has been deduced from infrared observations of ammonia (NH3) molecules located in the circumstellar cloud around IRC 10216.
　　我们发现它所支持的view在前面而且，是来使矛盾合理化。
　　文章说expect 二分之一如此消亡，然而实际上是三十分之一如此消亡，那是不是就产生矛盾了，那就必须有一个解释使得它合理化。理论确实如此，而实际也没错。
　　比如，杰哥说我很帅，鑫哥说我很丑。杰哥所用的依据是一张我的照片。
　　这个时候我们要使得矛盾合理化，那就是--杰哥拿的那张照片是P过的，所以杰哥鑫哥都没说错，我还是我，只是不同呈现的我。
　　那么上面是理论与实际不符，那view就是要矛盾合理化：reconcile seemingly contradictory facts
　　以上就是逻辑单题在阅读题中的应用。
　　但着一步，我们还是需要了解本身逻辑单题的解法。比如：很多同学都会对assumption题很头疼，我想了一句**口诀：