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题库 / GMATLA-CR-74
When storing Renaissance oil paintings, museums conform to standards that call for careful control of the surrounding temperature and humidity, with variations confined within narrow margins. Maintaining this environment is very costly, and recent research shows that even old oil paint is unaffected by wide fluctuations in temperature and humidity. Therefore, museums could relax their standards and save money without endangering their Renaissance oil paintings.
Which of the following is an assumption on which the argument depends?
Renaissance paintings were created in conditions involving far greater fluctuations in temperature and humidity than those permitted by current standards.
Under the current standards that museums use when storing Renaissance oil paintings, those paintings do not deteriorate at all.
Museum collections typically do not contain items that are more likely to be vulnerable to fluctuations in temperature and humidity than Renaissance oil paintings.
None of the materials in Renaissance oil paintings other than the paint are vulnerable enough to relatively wide fluctuations in temperature and humidity to cause damage to the paintings.
Most Renaissance oil paintings are stored in museums located in regions near the regions where the paintings were created.
painting中除了paint涂料还有其他的材料
None of the materials in Renaissance oil paintings other than the paint are vulnerable enough to relatively wide fluctuations in temperature and humidity to cause damage to the paintings.=>negate=>文艺复兴时期油画中的一些材料而非涂料贵重到不能忍受相对大幅度的温度和湿度的变化，从而对油画作品产生危害。What are compared here are materials in R oil paintings and the paint.
oil paint≠oil paintings
oil paint is a thick paint used by artists, usually in plural forms.
CUZ[maintaining the protection environment for R paintings are costly AND recent researches have shown old oil paints are unaffected by wide range of temperature and humidity]=>THUS[museums can relax their protection standards for R oil paintings without endanger these paintings]
assumption=negate choices=>to weaken: another factor can lead to a damage to R oil paintings as a result of lifting strict protection standards
文中：even old oil paint is unaffected by wide fluctuations in temperature and humidity. Therefore, museums could relax their standards and save money without endangering their Renaissance oil paintings.旧的颜料不会被温度和湿度影响，所以，保存R油画的时候可以放宽标准。
D.R油画中除了颜料，没有其他材料会因为温度或湿度易被破坏。（画中除了颜料可能还有纸啊什么乱七八糟的不会对温度和湿度敏感）
因果
B 原文只说明放宽条件后和现有条件效果一样，没说现有标准一定不会损坏
C 原文结论是油画不会被损坏 和其他展品无关
CD 看上去差不多，但是强调的重点是不一样的。C 比较的是oil painting 和博物馆里面的其他藏品。但是题干讲的却只是如何收藏oil painting.
D 是答案。
我好像知道我哪里错了...... 自己读题的时候思维定式,看到even old oil paint 就总觉得是样本代表性问题，然后读C选项时不由自主的把 "other items "脑补成了"普通的 oil paint"，后面的" R oil paintings "脑补成 "old oil paintings"。下次会认真读题的/(ㄒoㄒ)/~~ C选项其实对比的是"other items" 和"油画 "，本文就是要保护油画，其他的藏品受不受伤害不在本题考虑的范围内，C属于无关选项。
这个题我看了毫不犹豫的选了C，以为是枚举推理—样本代表性的问题，然后看了答案是D。 D选项的目的可能是排除其他变量，可是我总觉得这个题第一句话暗含了只有温度和湿度实验的变量，其他不用考虑。