2020年1月22日GRE数学机经预测

2020年1月10日GRE机经：GRE填空机经骨头是一种生理上___ tissue：它能够根据身体在不同阶段的需要change size and shape.Although教授Pearson的同事经常抱怨他_____, 他的朋友quick to defend him from this charge of ____作者把book publishing描述为一个相当灰暗的hidebound industry, 面对着变革内部生产模式的深刻机遇 but is so____ its past as to be (ii)______ 科技变革所提供的际遇。

传统的Vietnamese文化长期promoted性别平等观点：founding myths ___ 父母在照顾孩子上的平等分工。

As is often the case, however, theoretical commitments are (ii) __ actual processes. 实际上，基于性别的___一直存有。

因为movie studios，在获取国际销量的压力下，have favoured 带有fantasy plots的大制作影片，那些代表着日常domestic life的内容has largely been_____ 其他媒体，如电视或者文学Well organized and researched并包含了所有重要的医学科学发现，这本《西方医学史》能够被justly called _____这个官员也许发现了解决当前财务困境的genuine resolution，但是她也许被引诱加入了一个欺骗中： a ____ exercise in fiscal prudence.过度强调汽车的安全性也许会带来一种____ effect：驾驶员会相信汽车的safety，从而在开车的时候更为不小心。

与我们的常识(蟑螂是一种非常tough resistance的动物)相反，它as____ as其他昆虫Chanel的小黑裙(即LBD)so____ that 每个女人都有一件。

2020年1月22日GRE填空机经预测1. The cognitive flexibility of successful fictional detectives is often ____ by their cultural ambivalence：detectives' intellectual acumen, it seems, exists in direct proportion to their uneasy place in society.A. spurnedB. spadedC. spurredD. matchedE. emaciated答案：C解析：这道题的意思是说成功的侦探非常灵活，这是他们的文化矛盾所____：他们的社会地位越是动荡，他们就越发敏锐。

(a)唾弃(b)铲除(c)激励(d)匹配(e)消瘦。

我们通过后半句能够知道，是社会地位的动荡使得侦探日益敏锐和灵活，对应选项C中：spurred。

2. Professor Ramfield describes in his recent book publishing as dark as it is deep, even as one hidebound industry, indeed, it is facing a profound change in its product model, but is so (i)___ its past as to be(ii)____opportunities offered by technological change.Blank (i) Blank (ii)A. indebted in D. unable to seizeB. encumbered by E. capable of seekingC. irrelevant with F. definite to circumvent答案：BD解析：这道题是说Ramfield教授在书里描述说，呆板的产业正在面临产品模型的巨大改变，但是它们太过(i)____过去，以至于(ii)______科技改变带来的机会。

2020年1月22日GRE考试真题预测(GRE写作)ISSUE 篇10月30真题Scientists and other researchers should focus their research on areas that are likely to benefit the greatest number of people.10月17真题Scientists and other researchers should focus their research on areas that are likely to benefit the greatest number of people.9月20真题IC： People's behavior is largely determined by forces not oftheir own making9 月6 日真题Some people claim that the goal ofpolitics should be the pursuit of an ideal. Others argue that the goal shouldbe finding common ground and reaching reasonable consensus.Write a response in which you discusswhich view more closely aligns with your own position and explain yourreasoning for the position you take. In developing and supporting yourposition, you should address both of the views presented.8 月29 日真题The best way to understand the character of a society is to examine the character of the men and women that the society chooses as its heroes or its role models.8 月21 日真题18. The well-being of a society is enhanced when many of its people question authority?7 月10 日真题45. "Competition for high grades seriously limits the quality of learning at all levels of education."7 月5 日真题9. In any field of endeavor, it is impossible to make a significant contribution without first being strongly influenced by past achievements within that field.6 月28 日真题77. People's attitudes are determined more by their immediate situation or surroundings than by society as a whole.人的态度是由即时环境决定的还是社会整体环境决定的。

2020年新GRE数学考试学习策略：画图法GRE数学疑难问题之一1、关于一个地方的居民承诺捐款：要求的捐款数￥居民人数100 2058 3035 2010 10问，要求一个居住区的居民捐款，上表是居民承诺的捐款上限表，问：下列哪个钱，能够保证有半数以上(含)能够捐款。

I.35 II.54 III.21，问哪几个数字符合条件。

解答：如果设定捐款数是54，那么承诺捐款上限为100的20 个人和上限为58的30个人都会捐款，这样加起来就是50个人，居民总人数是20+30+20+10=80人，所以超过半数。

连54都能够，35、21就更能够。

所以理应全选。

2、学生总数240，学SCIENCE的是140，学MATH的170，求LEARN MATH BUT NOT SCIENCE的人数?1)THERE ARE 55 STUDENTS WHO LEARN SCIENCE BUT NOT MATH2)30 DIDN‘T SEL ECT ANY SUBJECT这种题有两种解题方法：1)、画图法画两个相交的圆A、B。

圆A下写学甲科的总数，圆B下写学乙科的总数;两圆相交的部分写两科都学的数量，不相交的部分写各自只学一门的数量。

再在外面画一个大方框，是学生总数，圆外方框内是什么都不学的。

这样就一目了然了。

2)、概念法P(A,B)=P(A)+P(B)-P(AB)以本题为例，至少学一科的=只学甲科+只学乙科-两科都学全集=A+B-A交B+非A非Bnormal distribution下One standard deviation away from the mean的possibility为68%，Two standard deviation away from the mean的possibility为95%，standard deviation = 10。

一种cougar的体长呈正态分布，均值60英寸，问体长在70到80英寸之间的概率?落在平均值标准方差内的概率possibility => (mean - deviation)60-1060-10*2只落在一边的概率就要除以二，基本上这种题画一条数轴，做几个点会更一目了然一些。

新gre机经：数学部分1. 类似the smallest integer that satisfies x^2>65和8的比较，或者是能不能被什么除尽的余数之类，都需要需要注意这个integer是positive还是negative还是两者皆可- 绝对值 x y之差和之积，一元二次方程绝对值求解- shaded area和cirle面积相比注意是谁比谁大圆小圆直径看清楚- 公约数(出了道A的鞋是B的鞋的1/3 C的鞋是B的鞋的两倍C<30 问C的可能性)- 概率倒是没有考多少很简单有一道5个数在数轴上 3个2负取三个数都正的概率- 五边形内角和考了一下- 三角形两边之和与两边之差与第三边的关系- 统计图形要特别注意图下的* 有一道题这个*正好是被计算器挡住了我怎么算都算不对阿。

后来检查的时候把计算器挪开才发现。

当时内心感叹nice trick。

题目是逐年income per capita和revenue per capita之间各种ratio 后来提到college education revenue per capita is 2 times the secondary and primary education revenue 然后算一个college education revenue 和同年income per capita的比较我就是没有看到图下说revenue per capita here include only primary and secondary education...2. 数学出了几道分布和标准差的3. 出现了那个一个数列，12乘以前一个数的平方=下一个数问第5个数是12的几次4. 如图，一个等腰直角三角形(大的那个)面积是r，内切一个正方形，问1(图中左边那个小的)部分的三角型面积，答案是2/9r。

5.数轴上5个点，2个负的3个正的，问随机选3个，全正的概率。

2020年1月22日GRE考试真题预测(GRE逻辑)Each of two particular inspection systems that are based on different principles would detect all product flaws but would also erroneously reject three percent of flawless products.Assuming there is no overlap between the products erroneously rejected by the two systems and also no interference between the systems if both operate，using both systems and rejecting only those products found flawed by both would be a way of avoiding all erroneous rejections.Which of the following most precisely characterizes the reasoning in the argument?(A)The reasoning is conclusive，that is，the conclusion cannot be false if the statements offered in its support are true.(B)The reasoning is strong but not conclusive，if the statements offered in support of the conclusion are true，they provide good grounds for that conclu-sion，though it is possible that additional infor-mation might weaken the argument.(C)The reasoning is weak; the statements offered in support of the conclusion，though relevant to it，by themselves provide at best inadequate grounds for the conclusion.(D)The reasoning is flawed in that the conclusion is no more than a paraphrase of one of the pieces of evidence offered in its support.(E)The reasoning is flawed in that the argument treats evidence that a factor is necessary to bring about an event as if it were evidence that the factor is sufficient to bring about that event.In recent years，there has been a dramatic decline in the population of the shrike，a predatory bird that inhabits flat land，such as farms and pastures.Some ornithologists hypothesize that this decline is due to the introduction of new，more effective pesticides to control the insect species on which shrikes prey.The answer to which of the following questions is NOT relevant to evaluating the ornithologists' hypothesis?(A)Was there a decline in the shrike population before the new pesticides were first used?(B)Have shrike populations declined significantly in those habitats where the new pesticides have not been used?(C)Have the new pesticides more significantly reduced the population of insect species on which shrikes prey than did the pesticides previously used?(D)Are insects that have consumed the new pesti-cides more toxic to the shrikes that eat those insects than were insects that consumed the less effective pesticides?(E)Are the new pesticides considered by most people to be less harmful to the environment than the old pesticides were considered to be?Certain extremely harmful bacteria found only in sewage are difficult to detect directly.Testing for E.coli，aneasily detected and less harmful type of bacteria，in ocean water would be a reliable way of determining whether or not these more harmful bac-teria are present，since ocean water contains E.Coli only if the water is contaminated with sewage that contains the harmful bacteria.Which of the following，if true，most seriously weakens the argument?(A)There are many different strains of the E.coli bacteria，and only some of these strains are harmful.(B)Some types of bacteria found in sewage are neither disease-causing nor difficult to detect directly.(C)Some of the types of bacteria found in sewage along with E.coli are not harmful to people unless the bacteria are ingested in large quantities.(D)E.coli dies out much more quickly than some of the more harmful bacteria found in sewage and then can no longer be easily detected.(E)Some of the types of bacteria found in sewage along with E.coli reproduce at a slower rate than E.coliFor more than fifty years, many evolutionary biologists posited that early fish such as Eusthenopteron developed limbs as a result of the need to drag themselves across short distances when their watery habitats dried up during periods of drought. However, new fossil evidence suggests that this hypothesis is incorrect. Fossilized remains of Acanthostega, a primitive fish, reveal that even though the animal had rudimentary limbs, it could not walk on land. Acanthostegalacked ankles, which means that its limbs couldn’t s upport its weight; furthermore, its ribs were too short to prevent the organism’s chest cavity from collapsing once the animal left water.1. Which of the following would most strengthen the author’s argument?A. The fossilized remains of the Acanthostega are the earliest known evidence of early fish.B. The modem descendants of Acanthostega are not able to drag themselves across short distances on land.C. Biologists have found that some aquatic species can successfully drag themselves across land even though these species do not possess ankles.D. Any animal with a collapsed chest cavity is not able to survive long enough to travel even a short distance across land.E. Some evolutionary biologists believe that the new fossils are not from Acanthostega.答案：DAnaerobic glycolysis is a process in which energy is produced, without oxygen,through the breakdown of muscle glycogen into lactic acid and adenosinetriphosphate (ATP), the energy provider. The amount of energy that can beproduced anaerobically is a function of the amount of glycogen present—in allvertebrates about 0.5 percent of their muscles’ wet weight. Thus the anaerobicenergy reserves of a vertebrate are proportional to the size of the animal. If, forexample, some predators had attacked a 100-ton dinosaur, normally torpid, thedinosaur would have been able to generate almost instantaneously, viaanaerobic glycolysis, the energy of 3,000 humans at maximum oxidativemetabolic energy production.1. The passage‘s suggestion that the total anaerobic energy reserves of a vertebrate are proportional to the vertebrate‘s size is based on which of the following assumption?(A) larger vertebrates conserve more energy than smaller vertebrates(B) larger vertebrates use less oxygen per unit weight than smaller vertebrates(C) the ability of a vertebrate to consume food is a function of its size(D) the amount of muscle tissue in a vertebrate is directly related to its size(E) the size of a vertebrate is proportional to the quantity of energy it can utilize答案：E解析：文本是关于无氧糖酵解产生能量的这程，且提出动物体积越大，所产生的能量储备也就越多。

1.y=2x2+7x – 3x y2.The figure above shows the graph of a function f, defined by f(x)=|2x|+4 for all numbers x. For which of the following functions g defined for all numbers x does the graph of g intersect the graph of f ?A g(x) x–2B g(x) x 3C g(x) 2x – 2D g(x) 2x 3E g(x) 3x – 23.Each employee of a certain company is in either Department X or Department Y, and there are more than twice as many employees in Department X as in Department Y. The average (arithmetic mean) salaryis $25,000 for the employees in Department X and is $35,000 for the employees in Department Y. Which of the following amounts could be the average salary for all of the employees in the company?Indicate all such amounts.A $26,000B $28,000C $29,000D $30,000E $31,000F $32,000G $34,0004.Working alone at its constant rate, machine A produces k car parts in 10 minutes. Working alone at its constant rate, machine B produces k car partsin 15 minutes. How many minutes does it take machines A and B, working simultaneously at their respective constant rates, to produce k car parts?____________minutes5.1)If the dollar amount of sales at Store P was $800,000 for 2006, what was the dollar amount of sales at that store for 2008 ?A $727,200B $792,000C $800,000D $880,000E $968,0002)At Store T, the dollar amount of sales for 2007 was what percent of the dollar amount of sales for 2008 ?Give your answer to the nearest 0.1 percent.___________%3)Which of the following statements must be true?Indicate all such statements.A For 2008 the dollar amount of sales at Store R was greater than that at each of the other four stores.B The dollar amount of sales at Store S for 2008 was 22 percent lessthan that for 2006.C The dollar amount of sales at Store R for 2008 was more than 17 percent greater than that for 2006.6.A certain store sells two types of pens: one type for $2 per pen and the other type for $3 per pen. If a customer can spend up to $25 to buy pens at the store and there is no sales tax, what is the greatest number of pens the customer can buy?A 9B 10C 11D 12E 207.A list of numbers has a mean of 8 and a standard deviation of 2.5. If x is a number in the list that is 2 standard deviations above the mean, what is the value of x ?x=______8.Frequency Distribution for List XNumber 1 2 3 5Frequency 10 20 18 12Frequency Distribution for List YNumber 6 7 8 9Frequency 24 17 10 9List X and list Y each contain 60 numbers. Frequency distributions for each list are given above. The average (arithmetic mean) of the numbers in list X is 2.7, and the average of the numbers in list Y is 7.1. List Z contains 120 numbers: the 60 numbers in list X and the 60 numbers in list Y.Quantity A Quantity BThe average of the 120numbers in list Z The median of the 120 numbers in list Z 9.The figure above shows the graph of the function f in the xy-plane. What isthe value of f ( f (–1)) ?A –2B –1C 0D 1E 210.By weight, liquid A makes up 8 percent of solution R and 18 percent of solution S. If 3 grams of solution R are mixed with 7 grams of solution S, then liquid A accounts for what percent of the weight of the resulting solution?A 10%B 13%C 15%D 19%E 26%11.Of the 700 members of a certain organization, 120 are lawyers. Two members of the organization will be selected at random. Which of the following is closest to the probability that neither of the members selected will be a lawyer?A 0.5B 0.6C 0.7D 0.8E 0.912.Line k lies in the xy-plane. The x-intercept of line k is –4, and line k passes through the midpoint of the line segment whose endpoints are (2, 9) and (2, 0). What is the slope of line k ?Give your answer as a fraction._______13.In the course of an experiment, 95 measurements were recorded, and all of the measurements were integers. The 95 measurements were then grouped into 7 measurement intervals. The graph above shows the frequency distribution of the 95 measurements by measurement interval.Quantity A Quantity BThe average (arithmetic The median of the 95mean) of the 95 measurementsMeasurements14.The random variable X is normally distributed. The values 650 and 850 are at the 60th and 90th percentiles of the distribution of X, respectively.Quantity A Quantity BThe value at the 75th750percentile of thedistribution of X15.If 1+x+x2+x3=60, then the average (arithmetic mean) of x, x2, x3, andx4 is equal to which of the following?A 12xB 15xC 20xD 30xE 60x16.Parallelogram OPQR lies in the xy-plane, as shown in the figure above. The coordinates of point P are (2, 4) and the coordinates of point Q are (8, 6).What are the coordinates of point R ?A (3, 2)B (3, 3)C (4, 4)D (5, 2)E (6, 2)17.Let S be the set of all positive integers n such that n2 is a multiple of both24 and 108. Which of the following integers are divisors of every integer nin S ?Indicate all such integers.A 12B 24C 36D 7218.The range of the heights of the female students in a certain class is 13.2 inches, and the range of the heights of the male students in the class is 15.4inches.Which of the following statements individually provide(s) sufficient additional information to determine the range of the heights of all the students in the class? Indicate all such statements.A The tallest male student in the class is 5.8 inches taller than the tallest female student in the class.B The median height of the male students in the class is 1.1 inches greater than the median height of the female students in the class.C The average (arithmetic mean) height of the male students in the class is 4.6 inches greater than the average height of the female students in the class.19.A random variable Y is normally distributed with a mean of 200 and a standarddeviation of 10.Quantity A Quantity BThe probability of the event 1/6that the value of Y isgreater than 22020.In a graduating class of 236 students, 142 took algebra and 121 took chemistry. What is the greatest possible number of students that could have taken bothalgebra and chemistry?__________students21.The total amount that Mary paid for a book was equal to the price of the book plusa sales tax that was 4 percent of the price of the book. Mary paid for the book with a $10 bill and received the correct change, which was less than $3.00. Which of the following statements must be true?Indicate all such statements.A The price of the book was less than $9.50.B The price of the book was greater than $6.90.C The sales tax was less than $0.45.22.Which of the following statements individually provide(s) sufficient additional information to determine the area of triangle ABC above? Indicate all such statements.A DBC is an equilateral triangle.B ABD is an isosceles triangle.C The length of BC is equal to the length of AD.D The length of BC is 10.E The length of AD is 1023.The fabric needed to make 3 curtains sells for $8.00 per yard and can be purchased only by the full yard. If the length of fabric required for eachcurtain is 1.6 yards and all of the fabric is purchased as a single length,what is the total cost of the fabric that needs to be purchased for the 3curtains?A $40.00B $38.40C $24.00D $16.00E $12.8024.The fabric needed to make 3 curtains sells for $8.00 per yard and can bepurchased only by the full yard. If the length of fabric required for each curtain is 1.6 yards and all of the fabric is purchased as a single length,what is the total cost of the fabric that needs to be purchased for the 3 curtains?A $40.00B $38.40C $24.00D $16.00E $12.8025.In the xy-plane, the point with coordinates (–6, –7) is the center of circle C. The point with coordinates (–6, 5) lies inside C, and the point with coordinates (8, –7) lies outside C. If m is the radius of C and m is an integer, what is the value of m ?m =_____26.What is the least positive integer that is not a factor of 25! and is not a prime number?A 26B 28C 36D 56E 5827If 1 is expressed as a terminating decimal, how many nonzero digits1/[(211)(517)]will the decimal have?A OneB TwoC FourD SixE Eleven28.Eight hundred insects were weighed, and the resulting measurements, in milligrams, are summarized in the boxplot below.(a) What are the range, the three quartiles, and the interquartile range of the measurements?(b) If the 80th percentile of the measurements is 130 milligrams, about how many measurements are between 126 milligrams and 130 milligrams?29.The figure shows a normal distribution with mean m and standard deviation d, including approximate percents of the distribution corresponding to the six regions shown.Suppose the heights of a population of 3,000 adult penguins are approximately normally distributed with a mean of 65 centimeters and a standard deviation of 5 centimeters.(a) Approximately how many of the adult penguins are between 65 centimeters and 75 centimeters tall?(b) If an adult penguin is chosen at random from the population, approximately what is the probability that the penguin’s height will be less than 60 centimeters? Give your answer to the nearest 0.05机经题：8月5选11. 3个数的平均数是30，把这3个数翻倍之后也加在这个list中。

新Gre易错数学题即相关机经汇总易错题与机经汇总1. n个数从⼩到⼤排列，求（n-1）/4，设商为i，余数为j ，则可求得1st Quartile为：（第i+1个数）*（4-j）/4+（第i+2个数）*j/42. 4个*，2个·的排列⽅式15（=）3 .5双袜⼦，同时去2只，刚好配对的概率。

1/94. 40⼈说French，60⼈说Russian，80⼈说Italy，说两种语⾔的有50⼈，说三种语⾔的有10⼈。

共有125⼈，问不说这些语⾔的有⼏⼈。

Key:125-（40+60+80-50-10*2）=155 。

等腰直⾓三⾓形边长2加2倍根号2，求⾯积。

6. 某种溶液浓度为125gram per liter，转换成ounce per gallon，求表达式。

已知 1 ounce=28.xxx gram and 1 gallon=3.875 liter7. x，y，z 均⽅差为d，求x+10，y+10，z+10的均⽅差（d）8. 1的概率是0.8，2的概率是0，6，问是1或是2或是both的概率，1-0.6*0.8（数字瞎编）=0.92.9. 还有⼀组测量数据中，12.1⽐mean低1.5个标准差，17.5⽐mean⾼3.0个标准⽅差。

问mean是多少.13.9（设标准差为X12.1+1.5X=M，17.5-3X=M）10. 图表题，1992年总和是50，96年是60，每年⾄少增长1，问最⼤的年增长：7.011 .x+y=5&2x+2y=8之间最短距离与1⽐较《112. 以40miles/hour速度经过⼀1.5miles的路，若超速则罚款fine=50+（速度-40）*10，现⼀⼈⽤108秒通过此路，问她的fine=？key 15013. xyz togather finish the task for 9 hour，xy togather need 12 hour，z alone needs ？hour. key 3614. 直线l.在X轴截距是3，在Y轴截距是4。

2024年1月GMAT试题MATH局部总结2024年1月GMAT试题MATH局部总结精选2篇〔一〕2024年1月GMAT试题MATH局部总结作为全球范围内广为认可的商学研究生入学考试，GMAT的数学局部一直都是考生们最为担忧的局部之一。

2024年1月GMAT数学局部继承了往期试题的难度，同时也在一定程度上有所变化。

通过对这一局部试题的总结和分析，可以帮助考生更好地理解和复习数学局部的内容和考点，为顺利通过GMAT考试打下坚实的根底。

本次GMAT数学局部试题共计37道，以整数、小数、分式、代数方程和几何等多种类型的题目为主。

整体难度中等偏上，局部试题具有出乎意料的难度，而有些试题那么相对简单。

但是与前面局部不同的是，数学局部时间相对较紧，考生需要尽快完成每道题目，否那么会降低正确率。

下面我们将从不同的角度，对一些常见的试题类型进展总结和分析。

1.整数与小数整数局部试题难度相对较小，在集合、排列组合等根本数学知识的根底上，通过简单的推算即可得出正确答案。

相对来说，小数局部题目的难度更大一些，需要对数字处理和计算有精准而灵敏的掌握，同时需要注意数据量级和单位的转换等问题。

需要注意将小数表示为分数，进展进一步的计算，以防止小数乘法和除法在计算机上产生的误差。

2.分数分数类型的题目是整个数学局部考试的核心，涵盖了相关的根本知识、比例、百分数、平均数、误差等内容。

分数的计算需要注意正确的约分、分母分子的转换、分数的分解等问题。

同时，考生还需要掌握求特定分数的过程，如1/7、1/9、1/11、1/13等，这些分数对一些直接计算问题非常有帮助。

3.代数方程代数方程是GMAT数学局部的难点和重点，也是考察考生对数学知识掌握程度的重要标志。

代数方程主要考察考生对方程的解法和操作的掌握程度，在解题的过程中需要注意切入点和思路的转换，同时需要注意精度的把控，防止连续计算产生的误差。

4.几何几何类型的题目在难度上介于中等和难之间，主要涉及到规那么图形、三角形、多边形等根底知识的运用。

2020年1月2日GRE北美机经1.2VQVQV作文政治决定是不是都由政治家决定"All students should be required totake the driver’s education course at Centerville High School. In the past twoyears, several accidents in and around Centerville have involved teenagedrivers. Since a number of parents in Centerville have complained that they aretoo busy to teachtheir teenagers to drive, some other instruction is necessaryto ensure that these teenagers are safe drivers. Although there are two drivingschools in Centerville, parents on a tight budget cannot afford to pay fordriving instruction. Therefore an effective and mandatory program sponsored bythe high school is the only solution to this serious problem."V 考了十四修正案/云和气候变化预测/康老师逻辑机经中水坝遗迹填空有Although Emily Bronte is little impassioned about gender equality, She is anything but___toendorse more privileges endowing to women.A. zealousB. apatheticC. abhorrentD. stubbornE. Lethargic 答案B有panacea数学记得不多了有一个n边行(n>5) A： n边行内角和的2倍 B：2n变形内角和X把东西买给Y,Z,W,N X卖给Y 1/3, X卖给Z 1/5 剩下的2/3 卖给W. N 有多少(数字记不清了瞎写的)有个人有正方形16平米的地要把它加6平米,延长成长方形要延长多少(x-3)*(y-5)=0 A：xy B：15八等分的八边形(8个三角形)内接于圆，求他们的大角，是67.5°袋子里10个红球 6个蓝球取出两个球不同颜色的比例a-a^2 a^2-a比大小这次数学考得特别tricky，有特别多是不能确定大小，但总体感觉还行Issue：Claim： "Major policy decisions should always be left to politicians and other government experts"Reason： They are more informed and thus have better judgment and perspective than do members of the general public."Argue：说A地有个unique pattern baskets，然后发现ancient villageB地也有。

gre机经预测怎么用_gre机经预测通过研习机经，在考场上看到原题的几率也是很大的，由于对文章大意和主题的熟识，必定会提升对文章的理解程度。

多分析一些阅读机经里的真实考试的阅读文章，对阅读能力的提升的作用是很大的。

但平常大量科学系统的训练，特别是对文章结构的分析和内容信息的处以及对各类题目解题规律的熟练掌握，也是不可或缺的。

阅读机经中经常会有一些关于文章和题目的解释、分析和做题思路的回忆，好好学习一下的话对提升阅读分数还是很有参照价值的。

2gre机经猜测gre填空和数学考试机经的使用方法关于gre填空考试和数学考试的机经，考生要对加试部分要进行充分的了解。

加试部分是考生参加gre考试一定会碰到的状况，虽然加试部分不计入成绩，但是依据以往的一些经验，这些加试题目通常都是ets出卷人的测试题目，如果时机成熟，那么这些加试题目就有可能变成正式的gre考题，所以考生关于每次考试中所出现的加试题目也不要掉以轻心，也要认真对待。

gre阅读考试机经的使用方法帮助考生了解考试的侧重方面，摸清出题方向。

3gre阅读机经GRE阅读机经的价值GRE阅读机经如果使用得当，可以关于GRE考试成绩有一定程度的提升。

如果是一个水平不高的GRE考试者，利用机经则有可能使你的成绩轻松提升数十分，即使是高手也能有稳定情绪节约时间的效果。

关于gre阅读考试来说，考生不能同和准备gre写作考试一样，提前准备范文或者是一些解题思路，所以gre阅读考试机经给考生提供的最大的帮助，就是可以通过对机经的学习，帮助考生熟悉话题，摸清出题的主要方向，所以考生在平常的复习中，就可以多加了解一些gre阅读的话题，让考生在真正的考试中能够集中精力进行做题，减少不必要的紧张感。

但是，GRE阅读机经毕竟是靠回忆得来的资料，不免会存在一些误差和失真，比如题目的不完整，答案也因人而异，值得商榷和斟酌。

由于GRE题库中题目的会重复出现，所以在考场上看到阅读机经的几率是大大存在的。

声明：预测机经本身不是考试答案，不要错误的认为预测机经应该100%命中，我们应该清楚“尽人事，待天命”，万一不幸中的不幸没有命中预测中的内容，希望大家也不要埋怨任何人，毕竟谁都尽了全力。

以良好的心态面对考试，望所有群友考试顺利。

谢谢。

简单介绍：此次针对1月22号的韩国机经团购，韩国老师预测。

是郑老师，预测了共13套，其中重点是9套，而且9套中命中；下面给大家公开09.11.13北美机经，也就是11年1月22号命中的机经。

经验表明，结合韩国机经和中国机经一起看，才能发挥机经的最大功效。

参与团购的考生，考后希望也不要随意上传网上，让我们一起维持团购资料的秩序。

在这里提供机经口语部分作为参考.注意：毕竟仅仅是机经，换句话说是考生的考后回忆，所以难免有一些错漏，仅供参考。

11/13/09 NASpeaking1. Describe the most memorable moment in your life. Use specific reasons and examples to support your answer.Possible responseThe most memorable moment in my life was when I got an admission from the university that I really wanted to enter. I could study my major, an education to be a teacher with famous faculties. I wanted to be a teacher for children so I had studied almost 10 hours every day to prepare for college entrance exam. I had to give up almost everything while studying for it. When I got the news I felt like, it was really outside of the world. I don’t forget the moment until now. Now I’m studying a child education to be a nice teacher to children happily. I always thank God I’m alive. That’s why I think I remember the moment that I got an admission from the university I’m going.2. Some people like to go to a live concert; others like to listen to music on CDs or radio. Which do you prefer to do and why? Use specific reasons and examples to support your answer.Possible responseSome might like listening to music on CDs, but I like to go to a live concert. I can enjoy time with music much more. When we go to a live concert we can sing along and dance with the singer and audience together. For me, when I went to --- concert, the singer sang songs with dance. So most of the audience including me danced with the songs and sang along. I was completely forgot what happened around me. I don’t need to worry about assignments, friends, and family etc. After the concert, I recharged my body and refreshed my mind and went back to my school life more energetically.4.Test-marketing내용이 회사가 뭘 만들면 special group을 통해서 이 제품이 어떤지 확인을 하고 나서 그 그룹의리뷰를 통해 다시 그 제품을 수정한다는 내용Professor: 교수가 말하는 것은 필름 회사가 있는 그 회사가 처음으로 애니메이션을 만들었다. 아이들 모아서 보여주고 뭐가 젤로 재미있냐 물어본 후 가장 아이들이 좋아했던 캐릭터의비중을 높여서 다시 만들어서 성공. 구체적으로 아이들이 강아지 나온 부분이 젤로 재미있다했다. 영화 제작사는 그 부분을 더 중요하게 리메이크 했다.Possible responseThe lecture is mainly about test-marketing. According to this lecture, the professor explains how the company makes a better product by testing in the market. For example, the professorstates that a film company made an animation for the first time. They were not sure how thepotential audience thought about the film. And then, they gathered a bunch of children and showedthe film and asked a question like what the most interesting part was. The children like the part which a pet showed in the film the most. The movie maker remade the film by focusing on the partthe children said. The film was very successful to the audience. Through this lecture, the professor introduces how the film company made a movie more successfully by test marketing in the market.5.M: Hi! Jenny, how are you doing?W: Oh! Hi, Kevin, I’m alright but I have a little problem.M: What is that?W: I left my important book in my car and I’m locked out of the key.M: You can call the Locksmith.W: I know, but it’s expensive.M: Do you have any idea to solve the problem?W: I have a spare key in my parents’ but it’s far from my house. So my parents want to send it by mail, but it would take a long time to delivery. I need the book right now.M: It would be a big deal then.Possible response6.Professor:For referenceRed mangroves, which can survive in the most inundated areas, prop themselves above the water level with stilt roots and can then absorb air through pores in their bark (lenticels). Black mangroves live on higher ground and make many pneumatophores (specialised root-like structures which stick up out of the soil like straws for breathing) which are also covered in lenticels. These "breathing tubes" typically reach heights of up to thirty centimeters, and in some species, over three meters. There are four types of pneumatophore—stilt or prop type, snorkel or peg type, knee type, and ribbon or plank type. Knee and ribbon types may be combined with buttress roots at the base of the tree. The roots also contain wide aerenchyma to facilitate transport within the plant식물 뿌리가 영양분 흡수 그리고 물 흡수 그리고 지지 작용을 한다. 그런데 mangrove 예를들면서 애 뿌리는 그라운드에 안 있고 하면서 그런 내용 // 뿌리가 나오는 식물 2가지얘기였는데。

GRE数学考题最新总结(1226)一、算术：1、A、B两事件独立。

A、B同时发生的机率为0、3，A单独发生的机率为0、5，问发生B的机率与0、5比大小。

key：A发生的概率为0、5+0、3=0、8；(AB)=0、3=P(A)*P(B)=0、8*P(B)(因为 A、B 对立) 所以P(B)=0、375<0、5。

解：因为A单独发生的机率为0、5并不包括AB同时发生的情况，所以A发生的概率应该是：A单独发生和AB同时发生概率之和即P(A)=0、5+0、3=0、8P(A)*P(B)=P(AB)。

P(B)=P(AB)/P(A)=0、3/0、8=0、3752、A出现的概率是0、6 ， B 出现 0、8，问A or b or both、出现的概率与 0、92比较大小。

解：~P(A)=1-0、6=0、4 ~P（B）=1-0、8=0、2 ~a*b=0、2*0、4=0、08 1-0、08=0、92所以是C、3、从320人中挑一人，挑中女生的概率是0、65，问这群人里女比男多的数和100比大小。

解：因为只挑一人，所以此题的概率其实就是百分比：男女生人数差异为320*（0、65-0、35）=96 所以100大，选B4、从 1到100 选两个不同的数，两者皆为6的倍数的机率？（注意！是两个不同的数！）解：100里共有6的倍数的个数100/6=16余4，则共有16个C（2 16）/C（2 100）=4/165=2、42%5、五个球，两个红、三个蓝，随机取两个，至少一个为蓝的概率。

解：1-C（2 2）/ C （2 5）=1-1/10=9/10附：至少一个为红的概率：1-C（2 3）/C （2 5）=1-3/10=7/106、从STAR和AMSS中各选一个letter，它们相同的概率。

（选出S的概率是1/4*1/2=1/8，选出A的概率是1/4*1/4=1/16，两者相加=3/16）7、一种试验有三种结果p，p/2，p/4，问p 于1-p 大小?解：my key:p=4/71-p=3/7 所以 p>1-p、8、在一条数轴上有两个负数，三个正数。

1.y=2x2+7x – 3x y2.The figure above shows the graph of a function f, defined by f(x)=|2x|+4 for all numbers x. For which of the following functions g defined for all numbers x does the graph of g intersect the graph of f ?A g(x) x–2B g(x) x 3C g(x) 2x – 2D g(x) 2x 3E g(x) 3x – 23.Each employee of a certain company is in either Department X or Department Y, and there are more than twice as many employees in Department X as in Department Y. The average (arithmetic mean) salaryis $25,000 for the employees in Department X and is $35,000 for the employees in Department Y. Which of the following amounts could be the average salary for all of the employees in the company?Indicate all such amounts.A $26,000B $28,000C $29,000D $30,000E $31,000F $32,000G $34,0004.Working alone at its constant rate, machine A produces k car parts in 10 minutes. Working alone at its constant rate, machine B produces k car partsin 15 minutes. How many minutes does it take machines A and B, working simultaneously at their respective constant rates, to produce k car parts?____________minutes5.1)If the dollar amount of sales at Store P was $800,000 for 2006, what was the dollar amount of sales at that store for 2008 ?A $727,200B $792,000C $800,000D $880,000E $968,0002)At Store T, the dollar amount of sales for 2007 was what percent of the dollar amount of sales for 2008 ?Give your answer to the nearest 0.1 percent.___________%3)Which of the following statements must be true?Indicate all such statements.A For 2008 the dollar amount of sales at Store R was greater than that at each of the other four stores.B The dollar amount of sales at Store S for 2008 was 22 percent lessthan that for 2006.C The dollar amount of sales at Store R for 2008 was more than 17 percent greater than that for 2006.6.A certain store sells two types of pens: one type for $2 per pen and the other type for $3 per pen. If a customer can spend up to $25 to buy pens at the store and there is no sales tax, what is the greatest number of pens the customer can buy?A 9B 10C 11D 12E 207.A list of numbers has a mean of 8 and a standard deviation of 2.5. If x is a number in the list that is 2 standard deviations above the mean, what is the value of x ?x=______8.Frequency Distribution for List XNumber 1 2 3 5Frequency 10 20 18 12Frequency Distribution for List YNumber 6 7 8 9Frequency 24 17 10 9List X and list Y each contain 60 numbers. Frequency distributions for each list are given above. The average (arithmetic mean) of the numbers in list X is 2.7, and the average of the numbers in list Y is 7.1. List Z contains 120 numbers: the 60 numbers in list X and the 60 numbers in list Y.Quantity A Quantity BThe average of the 120numbers in list Z The median of the 120 numbers in list Z 9.The figure above shows the graph of the function f in the xy-plane. What isthe value of f ( f (–1)) ?A –2B –1C 0D 1E 210.By weight, liquid A makes up 8 percent of solution R and 18 percent of solution S. If 3 grams of solution R are mixed with 7 grams of solution S, then liquid A accounts for what percent of the weight of the resulting solution?A 10%B 13%C 15%D 19%E 26%11.Of the 700 members of a certain organization, 120 are lawyers. Two members of the organization will be selected at random. Which of the following is closest to the probability that neither of the members selected will be a lawyer?A 0.5B 0.6C 0.7D 0.8E 0.912.Line k lies in the xy-plane. The x-intercept of line k is –4, and line k passes through the midpoint of the line segment whose endpoints are (2, 9) and (2, 0). What is the slope of line k ?Give your answer as a fraction._______13.In the course of an experiment, 95 measurements were recorded, and all of the measurements were integers. The 95 measurements were then grouped into 7 measurement intervals. The graph above shows the frequency distribution of the 95 measurements by measurement interval.Quantity A Quantity BThe average (arithmetic The median of the 95mean) of the 95 measurementsMeasurements14.The random variable X is normally distributed. The values 650 and 850 are at the 60th and 90th percentiles of the distribution of X, respectively.Quantity A Quantity BThe value at the 75th750percentile of thedistribution of X15.If 1+x+x2+x3=60, then the average (arithmetic mean) of x, x2, x3, andx4 is equal to which of the following?A 12xB 15xC 20xD 30xE 60x16.Parallelogram OPQR lies in the xy-plane, as shown in the figure above. The coordinates of point P are (2, 4) and the coordinates of point Q are (8, 6).What are the coordinates of point R ?A (3, 2)B (3, 3)C (4, 4)D (5, 2)E (6, 2)17.Let S be the set of all positive integers n such that n2 is a multiple of both24 and 108. Which of the following integers are divisors of every integer nin S ?Indicate all such integers.A 12B 24C 36D 7218.The range of the heights of the female students in a certain class is 13.2 inches, and the range of the heights of the male students in the class is 15.4inches.Which of the following statements individually provide(s) sufficient additional information to determine the range of the heights of all the students in the class? Indicate all such statements.A The tallest male student in the class is 5.8 inches taller than the tallest female student in the class.B The median height of the male students in the class is 1.1 inches greater than the median height of the female students in the class.C The average (arithmetic mean) height of the male students in the class is 4.6 inches greater than the average height of the female students in the class.19.A random variable Y is normally distributed with a mean of 200 and a standarddeviation of 10.Quantity A Quantity BThe probability of the event 1/6that the value of Y isgreater than 22020.In a graduating class of 236 students, 142 took algebra and 121 took chemistry. What is the greatest possible number of students that could have taken bothalgebra and chemistry?__________students21.The total amount that Mary paid for a book was equal to the price of the book plusa sales tax that was 4 percent of the price of the book. Mary paid for the book with a $10 bill and received the correct change, which was less than $3.00. Which of the following statements must be true?Indicate all such statements.A The price of the book was less than $9.50.B The price of the book was greater than $6.90.C The sales tax was less than $0.45.22.Which of the following statements individually provide(s) sufficient additional information to determine the area of triangle ABC above? Indicate all such statements.A DBC is an equilateral triangle.B ABD is an isosceles triangle.C The length of BC is equal to the length of AD.D The length of BC is 10.E The length of AD is 1023.The fabric needed to make 3 curtains sells for $8.00 per yard and can be purchased only by the full yard. If the length of fabric required for eachcurtain is 1.6 yards and all of the fabric is purchased as a single length,what is the total cost of the fabric that needs to be purchased for the 3curtains?A $40.00B $38.40C $24.00D $16.00E $12.8024.The fabric needed to make 3 curtains sells for $8.00 per yard and can bepurchased only by the full yard. If the length of fabric required for each curtain is 1.6 yards and all of the fabric is purchased as a single length,what is the total cost of the fabric that needs to be purchased for the 3 curtains?A $40.00B $38.40C $24.00D $16.00E $12.8025.In the xy-plane, the point with coordinates (–6, –7) is the center of circle C. The point with coordinates (–6, 5) lies inside C, and the point with coordinates (8, –7) lies outside C. If m is the radius of C and m is an integer, what is the value of m ?m =_____26.What is the least positive integer that is not a factor of 25! and is not a prime number?A 26B 28C 36D 56E 5827If 1 is expressed as a terminating decimal, how many nonzero digits1/[(211)(517)]will the decimal have?A OneB TwoC FourD SixE Eleven28.Eight hundred insects were weighed, and the resulting measurements, in milligrams, are summarized in the boxplot below.(a) What are the range, the three quartiles, and the interquartile range of the measurements?(b) If the 80th percentile of the measurements is 130 milligrams, about how many measurements are between 126 milligrams and 130 milligrams?29.The figure shows a normal distribution with mean m and standard deviation d, including approximate percents of the distribution corresponding to the six regions shown.Suppose the heights of a population of 3,000 adult penguins are approximately normally distributed with a mean of 65 centimeters and a standard deviation of 5 centimeters.(a) Approximately how many of the adult penguins are between 65 centimeters and 75 centimeters tall?(b) If an adult penguin is chosen at random from the population, approximately what is the probability that the penguin’s height will be less than 60 centimeters? Give your answer to the nearest 0.05机经题：8月5选11. 3个数的平均数是30，把这3个数翻倍之后也加在这个list中。

2020年GRE考试机经2020年GRE考试机经：1. issue： Claim： Governments must ensure that their major cities receive the financial support they need in order to thrive.Reason： It is primarily in cities that a nation's cultural traditions are preserved andgenerated.[ Issue05/117…(old10) 文化]2. argument：就是有一个调查，调查对象是300个male和female，然后发现sleep less than six hours 和 higher profit margins 正相关，于是就建议所有的公司应该雇佣睡觉时间少于6小时的人。

3. 数学：其他都不记得了，只记得几个自己不确定的...话说从中考到高考都败在数学上，这次也是...一如既往好稳定...(1)一组人平均身高是150cm，标准差是a(我忘记了，反正是一个具体的常数)，如果一个人，他的标准差是a的1.7倍，那他的身高是多少?(大概是这个意思)(2)还有一道图表题，调查600个公司，有些有benefits(包括health insurance，flex holiday等五项)，有些有incentive，有些两个都有，然后有一个问题问ratio什么的，时间不够没读懂。

4.填空一些是绿皮里面的原题，比magoosh简单。

5.阅读(1)科技文：讲晶体结晶的。

旧方法是用晶体生长，然后x线衍射解析解构;现在有一种新方法，让晶体的结晶体积变小，然后再衍射解构。

然后问什么strength了这个方法，我选的是体积变大，解析错误就会增多。

(2)企鹅：在A这个地方19世纪以前有一种企鹅，但是现在灭绝了。

19. A pianist agreed to perform one concert at a fee 12.5 percent less than her usual fee and a second concert at a fee 20 percent greater than the first fee. The fee for the second concert was what percent greater than her usual fee? A. 5% B. 7.5% C. 15% D. 16.25% E. 32.5%
1 y= x B. 2
C.y=x+3
y= xቤተ መጻሕፍቲ ባይዱ1
D.
2
y = 1 x+3 E. 2
13. A veterinarian has 70 clients who own cats, dogs, or both. Of these clients, 36 own cats, including 20 clients who own both cats and dogs. Which of the following statements must be true? Indicate all such statements.
20. Textbook
A B C D E
Number of Pages 510 480 490 520 x
The table shows the number of pages in each of 5 textbooks. What is the greatest possible value of x for which the average (arithmetic mean) number of pages of the 5 textbooks is equal to the median number of pages of the 5 textbooks?

6-10 D/D/E/A/AC
11-15 C/D/A/A/D
16-20 D/-3/BCD/E/E
第三套
section1
持续更更新，欢迎关注
1-5 C/D/A/C/C
6-10 D/A/A/E/300
11-15 E/E/BC/C/A
16-20 E/C/C/A/九分之八八
section2
1-5 D/A/A/C/A
7答案D
解析：如果x=4，那么2x=8的偶因子有3个：2,4,8 3x=12的奇因子有2个：1，3
如果x=5，那么2x=10的偶因子有2个：2,10 3x=15的奇因子有4个：
1,3,5,15。所以不能判断A与B的大小
8答案C
解析：A与B的大小是相等的，都是8。A中符合条件的有（-10，-8）， （-10,8），（10，8），（10，-8），（-8，-10），（-8,10），（8,10）
Section1
1答案c
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淘宝店铺：点睛英语
解析：n是大于2小于10的奇数，则n可能为 3,5,7,9。 n又不是质数，那么n只能
是9
2 答案d
解析：Quatity A>Quatity B容易满足；
若要Quatity A<Quatity B,那么s，t要尽可能小，u要尽可能大。取s=10，
35-44，45-54这三个年龄组都符合要求
15答案D
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淘宝店铺：点睛英语
解析：34岁以下受伤的人一共有18.6K+7.2K+2.2K=28K，那么34岁以下男性受伤
的有一半，为14K，又知道一共有39400名男性受伤，那么34岁以上受伤的男性
为39400-14000=25400