GMAT考试已于2012年4月2日更换题库，以下是2012年4月的GMAT阅读机经更新，更新日期从2012年4月2日起，澳际留学小编将为您提供最新的GMAT阅读机经。说明：*代表有考古。澳际留学在此祝大家GMAT考试顺利!

2*. 咖啡芳香的色谱研究

　　V1：by nicole0773

　　是关于科学家研发一个analyze coffee bean aroma的仪器。说原来的仪器有各种drawback。这种新仪器可以通过喷射一种叫m的物质来让不同的aroma显示出不同的color pattern，从而帮助coffee grower分析咖啡。

　　V2：by cappuccinolibr

　　检测 coffee aroma 的新方法 很多专业词汇。。凭印象记得 先说了两种旧方法 然后说 有一种electronic nose 说这种nose和前两个方法的drawback 一样。

　　然后才进入正题说新方法 新的方法是什么用 含有dye pigment 什么的一种什么。LZ实在记不得了 反正说了一段这种新方法的原理。。。然后说这种新方法的缺点是没办法确定coffee含的到底是哪种aroma。

　　V3：by happyamy

　　讲咖啡豆的。第一段说咖啡的成分很难分析，和原因。第二段是说有一个方法，就像给血液标记一样，可以标记咖啡的不同成分。好像还有一段评论性的东西。

　　V4：by perfectwen

　　第一篇是scientist发明检测咖啡aroma的新方法，貌似很多人知道，不过楼主是第一次遇见

　　Q1：问题：为什么咖啡成分那么难鉴定?

　　Q2：问和血液标记的相似处是什么?

　　考古(经狗主确认，自黄色部分开始，以及后面几段的相似性较高)：

　　Is that Folgers coffee in your cup or Maxwell House? Now you no longer have to rely on your nose to tell. Researchers have developed an analyzer that can distinguish between 10 commercial brands of coffee and can even tell apart coffee beans roasted at various temperatures for different times. The advance could help growers determine within minutes whether a particular batch of coffee is just as good as the previous one or whether it&aposs undrinkable.

　　Researchers have been trying for years to come up with a simple way to analyze coffee. But it&aposs no easy task. The challenge is that the aroma of roasted coffee beans consists of more than 1000 compounds that change with roasting temperatures and time. Traditional methods of chemical analysis like gas chromatography combined with mass spectrometry generally have difficulty distinguishing between compounds that are very similar to one another. And "electronic noses," an array of dyes, and other sensors that change color or chemical properties when they react with certain molecules suffer from the same drawback.

　　Over the past decade, chemist Kenneth Suslick and colleagues at the University of Illinois, Urbana-Champaign, have rined the electronic nose approach. In the new study, they used dyes that interact strongly with other chemicals, making them more specific. They then put drops of 36 dyes on a polymer film the size of a nickel. The pigments in the dyes belonged to a range of chemical classes, including metalloporphyrins (a class of molecules which give blood and chlorophyll their distinctive colors); pH indicators; and molecules that change color with certain chemical vapors.

　　The device produced a pattern of colors as each coffee&aposs mixture of volatile compounds interacted with the dyes. When the investigators pumped vapors from various coffees including Starbucks Sumatra Roast and Folgers Grande Supreme Decaf-over the arrays, all generated unique color patterns, like a molecular "fingerprint," they report this month in Analytical Chemistry.

　　The array doesn&apost give any information about the individual compounds in the aromas. "The important thing is that we can easily tell the difference between different roastings and coffees," notes Suslick. And that should help growers quickly and cheaply analyze problems with coffee, such as burnt flavors, during their initial screening process says food scientist Felix Escher at the Swiss Federal Institute of Technology Zurich.

　　3.二手书拍卖

　　V1：by 六毛欢乐多

　　说是used-book auction in Leiland(不确定这地名儿)，195几年的时候 然后city不同意， provience同意啥的。。。一共三段儿，第三段蹦出来一个人， 说了啥观点， 然后有一题就问：如果这个蹦出来的人说的话是真的， 那么195几年的那个used-book auction 会怎样?

　　V2：by cavashawn

　　还有一篇阅读讲的是 法国L城 在16世纪的第一次旧书拍卖

　　V3：by violahy 740

　　有一个关于Holland的书店。大概意思是说某个叫Leib神马的城市有audit神马拍卖会之类的。。。大概是想说其它城市的guild妨碍了这些bookstore的innovation之类的…只有这个叫Leib的城市没有受到太大影响。因为在这个城市有个书店的老板(缩写)叫EL，他向government audit office申请了什么地方用来拍卖，然后这个audit office同意了，despite the strong opposition of the local government and the guild，因为那个地方owned by the audit office

　　Q1：问这个文章主要在discuss什么：楼主选的“哪些原因contributed to 这个城市的unauthorized拍卖会”

　　Q2：另一个是问这篇文章那段“despite the opposition of…”imply了什么。楼主选了“说明那个auditoffice在某些权力上可以越过local government

　　以上就是4月9日更新的GMAT阅读机经，考生可以适当借鉴，并通过练习来掌握GMAT阅读的解题规律，从而在GMAT考试中发挥出更好的水平。 相关链接：

1.GMAT考试 2012年3月28日GMAT语法机经更新汇总

2.GMAT考试 4月9日更新GMAT阅读机经(一)

3.GMAT机经汇总 3月26日更新GMAT作文AI部分机经

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