随着GMAT改革的深入越来越多的学员感到迷茫和困惑到底GMAT路在何方，到底最新的机考题目难度如何.基于这样一个前提，专家把GMATpre和OG真题按着题型进行逐题分析，找到最佳的考试考点。

　　GMAT的重点题型之一平行并列：

　　平行并列：见到平行看结构，形式功能要对称.就GMAT而言，平行并列是考试中的重点也是难点，英语称其为parallel structure: this is a little bit  like making sure that the two sides of a mathematical equation are balance.就解题而言要求做到四个点。

　　形式对称

　　概念对等

　　功能相同

　　含义单一

　　一)形式对称：

　　指平行并列连接词前后的词形式上完全对称

　　下面以GMATpre test 1为例：

　　例1：The airline company, following through on recent warnings that it might start reducing service, announced that it was eliminating jet service to nine cities, closing some unneeded operations, and it grounded twenty-two planes.

　　(A) closing some unneeded operations, and it grounded
　　(B) closing some unneeded operations, and grounding
　　(C) was closing some unneeded operations, while it grounded
　　(D) it closed some unneeded operations and grounded
　　(E) it was closing some unneeded operations, and grounding

　　译文：航空公司遵照最近的警告它可能会开始减少服务而宣布它将会减少喷气机服务到九个城市,关闭不需要的操作和停飞22架飞机。

　　分析：平行并列结构,形式要对称.所以本题答案是B   eliminating, closing and grounding 本题重点考查平行并列结构.都是航空公司做的三个动作。

　　例2  The list of animals that exhibits a preference of either using the right or the left hand (i.e., claw, paw, or foot) has been expanded to include the lower vertebrates.

　　(A) exhibits a preference of either using the right or the left hand (i.e., claw, paw, or foot) has been expanded to include
　　(B) exhibits the preference to use either the right or the left hand (i.e., claw, paw, or foot) has been expanded and includes
　　(C) exhibit a preference in either using the right or the left hand (i.e., claw, paw, or foot) has been expanded to include
　　(D) exhibit a preference for using either the right or the left hand (i.e., claw, paw, or foot) has been expanded to include
　　(E) exhibit the preference as to either using the right or the left hand (i.e., claw, paw, or foot) has been expanded and includes

　　译文：动物展示出用左手或右手等的列表已经进一步的扩大到了更为低等的脊椎动物

　　分析：定语从句的主谓一致取决于所修饰对象.前面出现的是animals  所以应该是复数.答案只能在CDE中产生.either or 要求形式是要对称. 而C和E选项中出现了either using or the left表达错。

　　由此可见GMAT在考查平行并列过程中要求前后严格对称。

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