gre阅读考试中心句如何找到.doc

gre阅读考试中心句如何找到 gre阅读考试中心句如何找到? 为何要找gre阅读文章中心句? 之所以强调中心句,主要还是为了应对GRE阅读考试的出题思路.大家需要明确的一点是,想要做好GRE长篇阅读,考生其实并不需要把整篇文章都读懂吃透才能解题.许多类似主旨题态度题的阅读题目,考生只要能够结合文章中心句大致理解整体意思就能毫无困难的解题.gre阅读方法,gre考试培训而文章中许多细节案例,其实往往都是毫无用处的过量信息,纯粹是为了消耗大家时间而故意挖下的陷阱.因此,面对长篇阅读,考生首先要做的不是读完全文,而是找到中心句加快理解速度. 根据gre阅读考试文章套路结构找中心句 那么,如何才能快速找到中心句呢?这里小编建议大家结合GRE阅读文章本身的类型来寻找,一般来说,GRE阅读文章可以大致分为三种类型,每种类型的中心句位置各有不同,考生gre阅读考试解题需要根据文章类型来寻找中心句,具体如下: A. 现象解释型文章 文章开始给出现象,之后必定有解释,中心句在解释给出处.若解释不止一个,中心句则为给予正评价的那个. B. 新老观点型文章 中心句在新观点处(注意旧观点的取非). C. 问题解决方案型文章 中心句位于相应的解决方案处. 从语言现象中发现中心句提示信息 除了根据文章套路来找中心句外,gre阅读方法,gre考试培训大家有时候还可以根据文章本身的一些语言现象来找到暗示中心句所在的提示信息. A. 一段叙述后有转折连词 but, yet, however, actually, in fact, indeed, virtually, practically等,中心句位于转折之后作者态度处. B. 设问以及回答 作者的自问自答,中心句位于回答处. C. 大段举例 举例前的理论说明或者之后的归纳易成为中心句. GRE阅读练习题:地球冷暖周期通过石头含铁量推定 Recent studies of sediment in the North Atlantic’s deepwaters reveal possible cyclical patterns in the history of Earth’s climate. Therock fragments in these sediments are too large to have been transported thereby ocean currents; they must have reached their present locations by travelingin large icebergs that floated long distances from their point of origin beforemelting. Geol.ist Gerard Bond noticed that some of the sedimentgrains were stained with irono_ide, evidence that they originated in localeswhere glaciers had overrun outcrops of red sandstone. Bond’s detailed analysisof deep-water sediment cores showed changes in the mi_ of sediment sources overtime: the proportion of these red-stained grains fluctuated back and forth fromlows of 5 percent to highs of about _ percent, and these fluctuations occurredin a nearly regular 1,500-year cycle. Bond hypothesized that the alternating cycles might beevidence of changes in ocean-water circulation and therefore in Earth’sclimate. He knew that the sources of the red-stained grains were generallycloser to the North Pole than were the places yielding a high proportion of〝clean〞 grains. At certain times, apparently, more icebergs from the ArcticOcean in the far north were traveling south well into the North Atlantic beforemelting and shedding their sediment. Ocean waters are constantly moving, andwater temperature is both a cause and an effect of this movement. As watercools, it becomes denser and sinks to the ocean’s bottom. During some periods,the bottom layer of the world’s oceans comes from cold, dense water sinking inthe far North Atlantic. This causes the warm surface waters of the Gulf Streamto be pulled northward. Bond realized that during such periods, the influ_ ofthese warm surface waters into northern regions could cause a large proportionof the icebergs that bear red grains to melt before traveling very far into theNorth Atlantic. But sometimes the ocean’s dynamic changes, and waters from theGulf Stream do not travel northward in this way. During these periods, surfacewaters in the North Atlantic would generally be colder, permitting icebergsbearing red-stained grains to travel farther south in the North Atlantic beforemelting and depositing their sediment. The onset of the so-called Little Ice Age (_00-_60),which followed the Medieval Warm Period of the eighth through tenth centuries,may represent the most recent time that the ocean’sdynamic changed in this way. If ongoing climate-history studies support Bond’shypothesis of 1,500-year cycles, scientists may establish a major natural rhythmin Earth’s temperatures that could then be e_trapolated into the future.Because the midpoint of the Medieval Warm Period was about A.D. 850, ane_tension of Bond’s cycles would place the midpoint of the ne_t warm intervalin the twenty-fourth century. _.1. According to the passage, which of the following istrue of the rock fragments contained in the sediments studied by Bond? A. The majority of them are composed of red sandstone. B. They must have reached their present location over 1,500 years ago. C. They were carried byicebergs to their present location. D. Most of them were carried to their present location during a warm period inEarth’s climatic history. E. They are unlikely to have been carried to their present location during theLittle Ice Age. _.2. In the final paragraph of the passage (lines 27-33),the author is concerned primarily with A. answering a question about Earth’s climatic history B. pointing out a potential flaw in Bond’s hypothesis C. suggesting a new focus for the study of ocean sediments D. tracing the general history of Earth’s climate E. discussing possibleimplications of Bond’s hypothesis _.3. According to the passage, Bond hypothesized that whichof the following circumstances wou。