OG13-SC106 A选项 - 主谓离得有点远？

wxt_357

同疑惑，根据OG上的解释，为何同样都是“...emission, which..."结构，只有C选项“relative clause introduced
by which incorrectly and illogically modifies emission.” A选项就没有which修饰emission的嫌疑？

另外不太同意之前某楼的童鞋说的portion-induced X-ray emission是句子主语，它是作为called...开头的noun modifier的一个组成部分而存在，a technique应该才是句子主语&which所要修饰的先行词。

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stella要去英国 发表于 2013-3-3 22:35
我很好奇C为什么不对，A的which 怎么就不会修饰emissions了？

同问，明明两个which都是跟在emission，后面的，不是应该就近修饰emission吗

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在别的帖子看到的，由erkuai9526提供，我从曼哈顿直接贴过来哈
The difference is in the placement of the various phrases.

A: "(opening modifier), (noun) (modified by necessary descriptive phrase), which" - in this structure, which refers to the noun. Note that the few words right after "technique" are simply the name of that technique. These words ("technique called proton-induced X-ray emission") collectively make up the extended noun phrase to which "which" refers. The single-word noun is technique but the other words are necessary to understand what technique we're talking about.

C: "(Noun) (modifier), (modifer), which" - in this structure, we've separated what had been the necessary descriptive phrase from the noun, so it is no longer a part of any extended noun phrase. As a result, the "which" in this case really does only apply to "emission" rather than to a "technique called emission" b/c "a technique called emission" as a simple noun phrase, is no longer part of the sentence.