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题库 / Prep2008E2-SC-160
In a previous design, the weight of the discus used in track competition is concentrated in a metal center, but now it is lined with lead around the perimeter, thereby improving stability in flight and resulting in longer throws.
In a previous design, the weight of the discus used in track competition is concentrated in a metal center, but now it is
According to a previous design, the weight of the discus used in track competition was concentrated in a metal center, but now it is
Once designed with its weight concentrated in a metal center, the discus used in track competition is now
The discus used in track competition, once designed with its weight concentrated in a metal center, but now
The discus used in track competition was once designed having its weight concentrated in a metal center and now
题目分析：
略。
选项分析：
A选项：通常，代词的指代对象应是名词词组的核心词。因此，本选项中it的指代对象为weight of the discus，这在逻辑上是有问题的。真正在周边放上铅的应该是discus，而不是discus的重量；另外，is concentrated应改为was concentrated，划线部分给出了明显的过去时间in a previous design。
B选项：介词according to措辞有误，according to的意思是“根据”，我们不能说，“根据过去的设计，质量怎么怎么安放”，而应该说，“在过去的设计中，质量是怎么怎么安放的”。
C选项：Correct. 本选项在语法和逻辑上均是正确的。once designed with its weight concentrated in a metal center是伴随状语，其主语为the discus。
D选项：全句缺少谓语动词。
E选项：并列连词and身后缺少谓语动词。
D中but前面不是连接的完整的句子
E中and没有转折关系
E was designed and now lined，lined继承前面的谓语动词was，时态错误，应该是was designed and now is lined，比较句里谓语动词是否能省略也经常出现这种问题。
时态改变，不能并列
1.it 的指代，倾向于指代主语，名词短语的核心词 weight，这里是discus is lined with 铅在边缘2.时态
3.according to 意思不对
4.be designed for/as/with 没有直接加doing
5.时态不同，不能并列省略be，要补出be
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according to GMAC, the GMAT exam is designed to measure test-takers' reasoning abilities, not their knowledge of particular content.
用于田径比赛的铁饼 曾经被设计为将重量集中在金属中心处，现在是将其放在边缘，从而提高了飞行的稳定性并导致更长的投掷。
(C) （√）； Designed引导的过去分词结构作定语修饰句子主语 the discus，逻辑正确。
Once designed with…, the discus … is … now lined with…, thereby improving…
原先的设计是将重心放在金属中心处, 而现在是将其放在边缘…
生词:
discus n.(铁饼) 不误认做discuss
Perimeter n. 周边，边缘
考点：
1. 指代一致
2. line: vt. to cover the inner surface of
选项分析:
(A) it指代weight of the discus错误；划线部分is concentrated应该使用过去时态。
(B) it指代问题，同A； According to改变了原文的逻辑意思，原文不是想说根据，只是陈述客观事实。
(D) 全句缺少谓语动词。
(E) design固定搭配，没有design doing的结构； having concentrated 完成时使用没必要； 后半句没有谓语动词， and now 应该为and now is 时态改变，因此不能直接并列，前半句使用的是过去时态was.
2.句子逻辑，DE缺少be动词，因为物品自己不会line，是被Lined.DE错。
3.简洁，E的having..用法不简洁，E错
B. 同A
C. right
D. but后面句子不完整，跟前面成分平行后依旧不完整
E. and后面句子不完整，与前面成分无法构成平行
Line the pan with greaseproof paper. 在烤盘里垫一层防油纸。
The walls were lined with books. 靠墙是一排排的图书。
the discus is lined with lead around the perimeter，铁饼环绕周围地铺陈着铅。
铅围绕铺在重量上逻辑有错，排除a b
d e缺动词
考察：
once曾经；伴随状语；主语一致（找准主语）；语意
前：a的主语是the weight of the discus，而真正的后半段主语应改是discus
c考察伴随状语的变形，加了一个once曾经designed with its weight，主语是discus正确
要多对比语意，看哪个更合理。
b。语意有误，也很别扭；介词according to措辞有误，according to的意思是“根据”，我们不能说，“根据过去的设计，质量怎么怎么安放”，而应该说，“在过去的设计中，质量是怎么怎么安放的”
B weight 不能lined with 是discus lined with
D 没有动词
E and now 后面没有is
Line the pan with greaseproof paper. 在烤盘里垫一层防油纸。
The walls were lined with books. 靠墙是一排排的图书。
the discus is lined with lead around the perimeter，铁饼环绕周围地铺陈着导线。
只能用导线铺陈在铁饼上，不能铺陈在铁饼的重量上。