GMAT逻辑句子作用题具有独特的特点，只要大家仔细研究就能从中有很多发现，相信看完小编的介绍大家会有所了解。
一、GMAT逻辑句子作用题的定义
黑体题，又称boldface题目或黑脸题，或句子作用题。它的标志性特征是在提干中选出原文的某句话进行加粗，并提问加粗句子在原文中起到什么作用。
(详情请看 GMAT逻辑句子作用题综述)
二、GMAT逻辑句子作用题考察形式分类
1、解题思路：通读题目，解释黑体部分在文中的属性与关系。
2、解题步骤：
第一步，读全文，找出核心论点(不是中间论点)，读出转折含义，核心论点通常躲在转折之后和句尾。
第二步，看boldface句同前后句的关系(无转折既是逻辑上的延续)，分清是boldface句为其中某句服务还是某句为boldface句服务。
第三步，推出两个boldface句之间的逻辑关系(逻辑要求最高)。
3、解题技巧：
技巧：所有的逻辑都有两点：论据，论点，一个划线部分，要么论点，要么论据。凡是论点的内容一般都有conclude, think, therefore 这样的引用来指名，论据很多用because, since, for 等来提示。典型的标志如下：
1)找到句子之间的转折：
But, Yet, However, however, Nonetheless, Nevertheless, nonetheless, nevertheless…
句首负面评价也可能是转折
2)判断句子角色(选项)
论据：evidence, explanation, premise, consideration…
结论：conclusion, claim, position, judgment, prediction, proposal…
假设：assumption…
支持：endorse, support…
反对：call into question, oppose…
题干：Because 之后为论据，Consequently之后为结论, conclude that…
3)若文中没有转折，选项不能有表示拒绝、反对、质疑的词汇。
4)A, however B 作者：反驳A，支持B。
(详情请看 GMAT逻辑句子作用题图解分析法)
三、GMAT逻辑句子作用题例题分析
OG12-CR-124.(Boldface题型)新题
Museums that house Renaissance oil paintings typically store them in environments that are carefully kept within narrow margins of temperature and humidity to inhibit any deterioration. Laboratory tests have shown that the kind of oil paint used in these paintings actually adjusts to climatic changes quite well. If, as some museum directors believe, paint is the most sensitive substance in these works, then by relaxing the standards for temperature and humidity control, museums can reduce energy costs without risking damage to these paintings. Museums would be rash to relax those standards, however, since results of preliminary tests indicate that gesso, a compound routinely used by Renaissance artists to help paint adhere to the canvas, is unable to withstand significant variations in humidity.
In the argument above, the two portions in boldface play which of the following roles?
(A) The first is an objection that has been raised against the position taken by the argument; the second is then position taken by the argument.
(B) The first is the position taken by the argument; the second is the position that the argument calls into question.
(C) The first is a judgment that has been offered in support of the position that the argument calls into question; the second is a circumstance on which that judgment is, in part, based.
(D) The first is a judgment that has been offered in support of the position that the argument calls into question; the second is that position.
(E) The first is a claim that the argument calls into question; the second is the position taken by the argument.
①背景：收藏文艺复兴时期油画的博物馆，把油画放在温差小、湿度差小的地方，来防止损坏。研究显示，这种油画能够很好地适应气候的变化。如果像有些博物馆长认为的那样，油画是这些作品中最敏感的，那么通过放宽温度和湿度标准，博物馆就可以在不损坏作品的同时减少能耗。然而，博物馆放宽标准是草率的，因为初步测试表明艺术家常使用来画帆布的石膏不能承受过大的湿度改变。
②问题：BF.
③选项：A：第一句是反对观点，反对了总论点;第二句是总论点。
B：第一句是总论点;第二句是总论点做反对的观点。
C：第一句是判断，支持了总论点所质疑的观点;第二句是第一句的条件。
D：第一句是判断，支持了总论点所质疑的观点;第二句即是那个观点。
E：第一句是声称，被总论点所质疑的;第二句是总论点。
逻辑链：作者支持的观点：博物馆放宽标准是草率的，即博物馆不应该放宽标准。
支持的理据：因为初步测试表明艺术家常使用来画帆布的石膏不能承受过大的湿度改变。
作者反对的观点(总论点所质疑的观点)：博物馆可以放宽标准，放宽温度和湿度标准，博物馆就可以在不损坏作品的同时减少能耗。
支持这种观点的理据：因为这种油画能够很好地适应气候的变化。附加判断：油画是这些作品中最敏感的，能够很好适应气候变化。
(详情请看 GMAT逻辑OG16)
GMAT逻辑句子作用题百利天下小编通过例题分析已经为大家讲解了解题方法，掌握好原文中隐含的逻辑关系，解答这种题型并不困难。
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