-逼自己不甚解，不求全懂，是懂非懂. -答案是比出来的，只是挑错的 -解决问题，并非研究问题 这几句话大家怎么看呢，我现在对这两句话的感悟越来越深，实际上我们在gmat考试中如果是真的话，一篇阅读文章我们有多长时间去看呢，每道题也就是两分钟，前面的4分钟看阅读的时间还要加进来，时间相当的紧，我们答的时候就是这个就是对的，没有为什么，然而问自己为什么对，我会用5分钟的时间彻底的分析文章来告诉自己为什么对，比如mrna的文章 Protein synthesis begins when the gene encoding a protein is activated. The gene‘s sequence of nucleotides is transcribed into a molecule of messenger RNA （mRNA），which reproduces the information contained in that（5） sequence. Transported outside the nucleus to the cyto-plasm，the mRNA is translated into the protein it encodes by an organelle known as a ribosome， which strings together amino acids in the order specified by the sequence of elements in the mRNA molecule. Since the（10）amount of mRNA in a cell determines the amount of the corresponding protein， factors affecting the abundance of mRNA’s play a major part in the normal functioning of a cell by appropriately regulating protein synthesis. For example， an excess of certain proteins can cause cells（15） to proliferate abnormally and become cancerous； a lack of the protein insulin results in diabetes. Biologists once assumed that the variable rates at which cells synthesize different mRNA‘s determine the quantities of mRNA’s and their corresponding proteins（20） in a cell. However， recent investigations have shown that the concentrations of most mRNA‘s correlate best， not with their synthesis rate， but rather with the equally vari-able rates at which cells degrade the different mRNA’s in their cytoplasm. If a cell degrades both a rapidly and（25） a slowly synthesized mRNA slowly， both mRNA‘s will accumulate to high levels. An important example of this phenomenon is the development of red blood cells from their unspecialized parent cells in bone marrow. For red blood cells to accu-（30）mulate sufficient concentrations of hemoglobin （which transports oxygen） to carry out their main function， the cells‘ parent cells must simultaneously produce more of the constituent proteins of hemoglobin and less of most other proteins. To do this， the parent cells halt synthesis（35） of nonhemoglobin mRNA’s in the nucleus and rapidly degrade copies of the nonhemoglobin mRNA‘s remaining in the cytoplasm. Halting synthesis of mRNA alone would not affect the quantities of proteins synthesized by the mRNA’s still existing in the cytoplasm. Biologists now（40） believe that most cells can regulate protein production most efficiently by varying both mRNA synthesis and degradation， as developing red cells do， rather than by just varying one or the other.
5. To begin to control a disease caused by a protein deficiency， the passage suggests that a promising experimental treatment would be to administer a drug that would reduce （A） only the degradation rate for the mRNA of the protein involved （B） only the synthesis rate for the mRNA of the protein involved （C） both the synthesis and degradation rates for the mRNA of the protein involved （D） the incidence of errors in the transcription of mRNA‘s from genetic nucleotide sequences （E） the rate of activity of ribosomes in the cytoplasm of most cells
6.According to the passage， which of the following best describes the current view on the relationship between the synthesis and the degradation of mRNA in regulating protein synthesis？ （A） Biologists have recently become convinced that the ribosome controls the rates of synthesis and degradation of mRNA. （B） There is no consensus among biologists as to the significance of mRNA degradation in regulating protein synthesis. （C） The concept of mRNA degradation is so new that most biologists still believe that the vital role in protein regulation belongs to mRNA synthesis. （D） Degradation of mRNA is now considered to be the key process and mRNA synthesis is no longer believed to play a significant role. （E） Degradation of mRNA is now considered to be as important as mRNA synthesis has been， and still is，believed to be. 五题选择a 对应点However， recent investigations have shown that the concentrations of most mRNA‘s correlate best， not with their synthesis rate， but rather with the equally vari-able rates at which cells degrade the different mRNA’s in their cytoplasm. If a cell degrades both a rapidly and（25） a slowly synthesized mRNA slowly， both mRNA‘s will accumulate to high levels. 六题是e 对应点believe that most cells can regulate protein production most efficiently by varying both mRNA synthesis and degradation， as developing red cells do， rather than by just varying one or the other. 做题就是这样，找到对应点在前后无转折出现的话就是原文的问题的解决处~在我们平时练习时候喜欢分析第六题的前提是regulating protein synthesis 第五题的摄提点的前提是the concentrations of most mRNA’s correlate best, 他们有什么关系呢，又到文章中去找，但与做题毫不相关，实际上就是在我们常说的没有把有效的时间花在刀刃上，我们平时练习在分析上会对我们的阅读能力提高吗？ 一定会的 但是有利于gmat rc 考试不？ 也许会但多数会造成我们考试的习惯定性，不分析心不稳，力求全懂~这样的话就变成gmat考试中的障碍了。 我们能不关心的就不关心，可以不思考的就不思考，gmat的看文章看什么，是文章的结构层次，逻辑关系 文章说a对b好~比如a，b都去姥爷家时候，ab在饭桌上，a给b夹菜 .....题目可能问你的就是a对b好吗？在细的话就是a怎么对b好，但基本上怎样出的很少~我们在阅读时关心的就是逻辑关系a与b，细节会很绕口，会很繁琐，很多的生词，但是一般情况是对主题的修饰，题目会很少涉及 但是我可能会因为看不懂而心里不快，担心做题。 gmat考的是什么，我看大仙写的，gwd写的，感觉真的，这样的考试就是在靠我们是否是符合管理人才的标准 是否有管理人才的思维方式，即使是枯燥的阅读， _学会取舍 _不追求完美，不追求踏实，只最求相对更好 -个人太忙只会做必要的事件
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发表于 2010-2-23 07:55:09
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