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标题: 大全33，一个知识点的的疑问，有关 of which [打印本页]

作者: FlowerJay 时间: 2006-10-7 02:24
标题: 大全33，一个知识点的的疑问，有关 of which

1. A substance derived from the Madagascar periwinkle, which has proved useful in decreasing mortality among young leukemia patients, is cultivated in China as part of a program to integrate traditional herbal medicine into a contemporary system of health care.

(A) A substance derived from the Madagascar periwinkle, which has proved useful in decreasing mortality among young leukemia patients,

(B) A derivative, which has proved useful in decreasing mortality among young leukemia patients, of the Madagascar periwinkle,

(D) The Madagascar periwinkle has a derivative which has proved useful in decreasing mortality among young leukemia patients, that（E）

(E) The Madagascar periwinkle, a derivative of which has proved useful in decreasing mortality among young leukemia patients,

选项E的of which修饰的是什么。我觉得 a derivative是 The Madagascar periwinkle的同位语。但是这样的话 of which是指代什么呢？难道是说 The Madagascar periwinkle 是 The Madagascar periwinkle自己的 derivative？

不弄明白睡不着啊

作者: uibewsj 时间: 2006-10-28 00:00
a derivative不是 The Madagascar periwinkle的同位语，
which指the Madagascar periwinkle.

作者: jj82328 时间: 2006-10-28 00:59

我刚发了这个题，也是很不明白，觉得E不对。那Madagascar periwinkle在E 不是主语么？若是主语，则这个选项的意思就和原文不一样了。原文在说一种Madagascar periwinkle的萃取物，而不是他本身。查了字典，这个是一种植物。

作者: woyuhong 时间: 2007-8-26 08:51

a derivative of which has proved useful in decreasing mortality among young leukemia patients怎么做同位语？derivative和Madagascar periwinkle根本就不是同位语

作者: Hamiton 时间: 2007-8-26 10:11
这题在考逻辑理解。。。如果考场上碰到肯定选错。。GMAT 太阴险了，太卑鄙了，太无耻了。。。

substance是不能被cultivated的，只能是那个植物，所以主语必须改成 Madagascar periwinkle

至于of which，其实就是个非限定定语从句，如果改成 ~ periwinkle, whose derivative has proved...就好理解了，可惜periwinkle不是人，只能用which，所以就成了 derivative of which has proved...

作者: elaine1031 时间: 2009-7-10 11:04
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