[本月原题］11月阅读第12，26篇

wmyqGMAT

刚刚核实，确定是真题原文， 。。。。好像是一个GMAT老师整理的本月阅读机经，只弄了原文，很神经病的把题目都去掉了。不过那两篇原题是很给力的，第12，第26篇，
我已经把 文件粘贴成附件形式，你们随便下载吧，但是别说是我弄的。
大家拿好，祝愿高分！别问我是谁，请叫我雷锋。

Architects and designers have begun using glass to make load-bearing structures. Glass is very strong but starts to weaken the instant it is made. Even one gas molecule can break a silicon-oxygen bond, generating a tiny fissure that grows under stress. Protective coatings can help avoid new cracks but can affect transparency, the main reason for using glass in the first place.

Thus, structural glass is often strengthened by tempering, which compresses the surface so that more force is needed for the cracks to grow. Heat tempering, the process most often used, takes advantage of the fact that when glass cools slowly it shrinks and becomes denser. In this process, a sheet's exterior is cooled rapidly, keeping the surface less dense. As the hot glass inside cools slowly and shrinks to a denser structure, it pulls the surface inward and compresses it. Tempered glass can still break, but it breaks into more and smaller pieces than untempered glass, which reduces the chance of causing injury.

Tempering alone is usually not enough, however. A primary concern when building with glass is what happens if a component breaks. Unlike other materials, glass does not deform or otherwise give advance warning of failure, so if breakage occurs, maintaining the integrity of the structure is paramount. Lamination helps address this issue: glass sheets are bonded with thin interlayers made of plastic or other polymers; should a glass layer break, the interlayers keep the structure together. But lamination makes fabricating glass for structural uses very difficult. Because cutting into tempered glass causes it to break, each layer of the glass to be laminated must be polished and drilled for connecting fittings before being tempered and bonded together.

Some builders seeking to make glass structures unencumbered by metal or other materials are investigating less common kinds of glass. Conventional glass, called “soda-lime," expands when heated, so welding introduces stresses that can lead to failure. Components made of a less expandable glass could be welded together, forming, in effect, a continuous piece. Other builders are using adhesives to join glass pieces. Unfortunately, adhesives' long-term strength and reliability have not been established.

THEGREATMING

发表于 2015-11-18 01:58:56
求题目呀！！！

Mark一下

wmyqGMAT

whatsall 发表于 2015-11-19 18:28
谢谢分享! 不过没有题目,只有原文是比较奇怪,这个有什么说法么?

好像说，机经里面的变体多，如果不小心背错了答案，失分更惨，有一个什么曲线来的，好像说的就是机经的加分率减分率跟使用方法的关系，具体想不起来了， 你可以百度搜一下。

whatsall

谢谢分享! 不过没有题目,只有原文是比较奇怪,这个有什么说法么?

wmyqGMAT

抱歉各位，我也没怎么玩明白这个论坛。刚刚发现可以把文件粘贴成附件形式，你们随便下载吧，但是别说是我弄的。好像是一个GMAT老师整理的本月阅读机经，只弄了原文，很神经病的把题目都去掉了。不过那两篇原题是很给力的，第12，第26篇，大家拿好，祝愿高分！

crowd_bdfeng

感谢楼主！

wmyqGMAT

我发现CD论坛的私信有限制，大家加我QQ号吧，我传给你。QQ:153926699
为了证明我真的有题，我发一张截图给你们看。

sparklers

楼主大写牛逼啊！求题目同21号考！

carolineloveedd

楼主求两篇的题目！！谢谢！

panplant

雷锋！！！