OG12-107 Originally developed for detecting air pollutants, a technique called proton-induced X-ray emission, which can quickly analyze the chemical elements in almost any sbustance without distroying it, is finding uses in medicine, archaeology, and criminology.(正确句子) (B),Originally developed for detecting air pollutants, having the ability to analyze the chemical elements in almost any substance without destroying it, a technique called.... OG解释,second modifier (having..)actually modifies the first modifier. OG12--1 The Glass House Mountains...were sighted by ***, naming them supposedly because their sheer wet rocks glistened like glass. OG 解释: As the object of a preposition and not the subject of the clause, *** does not work as the noun that the verbal phrase beginning with naming can describe. 两者有何区别,为什么第二题的naming不能修饰它就进的***(人),而第一题中having解释为修饰了第一个短语。 本人愚笨,这个问题已经想了很长时间了,找参考书也没有合适的解释,希望NN解答,谢谢了~! -- by 会员 zzx8995 (2010/2/12 12:01:12)
第一句B里的doing,可以作状语修饰前面那句话developed,也可以做定语修饰后面的a technique,并且最开始的originally developed一定要紧接它修饰的名词,中间插入一个having引导的修饰句子,破坏了它的修饰范围。 第二句doing直接放在句子最后面,后面也没有别的句子或名词了,因此只能乖乖地做状语修饰前面的整个句子的动词 补充:GMAT考试里subject be done by object,一般为错的,被动语态只会出现在subject be done,没有done的实际动作发出者。
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